Seth Brundle X Reader - Blog Posts

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Only Science Can Explain It

Seth Brundle x fem!reader

SUMMARY: Who knew being stood up on date could lead you to reuniting with your favorite professor from college? With fate leading you two seeing each other again, you let fate decide what would become of you two by the end of the night.

WARNINGS: 18+, age gap (10 years), unprotected sex, professor trope (not his student anymore, but still)

NOTED: gender neutral bestie

A/N: This one has been collecting dust in my drafts for over a month. With the amount of times I've reread this and edited, it was time for it to see the light of day. This is my first, and certainly not my last, Seth Brundle imagine. Enjoy :)

WORDCOUNT: 5,585

<><><>

Late April of 1986. Cambridge, Massachusetts…

The sun was having no sympathy on your eyes as you walked from his car to your small bungalow home. Sunglasses were nowhere to be found and a headache was forming. 

A lack of sleep can do that to you, but you could care less. It was the first time in a long time where you found it completely worth it. Hell, you would do it all over again if you could. 

“Jesus, Y/N, I thought you died or something!” your roommate, Y/B/F/N exclaimed when you made your way into the home sheepishly. 

“I’m very much alive and somewhat dead, so there’s that.” You walk right past them to go to your room. After the physicality of last night you knew a shower was in order to freshen up. Though, you’re going to be upset washing the smell of him off your body. 

The grip of his hands on your hips are like ghosts for you; knowing it’s not there, but you can still feel that grasp. He was the last person you thought was going to be as rough as he was. But seeing his muscles bulge, his curls defining from sweat, his eyes blown out from the haze you had him in, you truly underestimated his clearly talented abilities. 

“So…where exactly were you?” your roommate made you jump as you yelped a little and turned to see them leaning up against your doorframe. Arms crossed with a smirk on their face, Y/B/F/N had a sneaky suspicion of how you enjoyed your night. 

You really weren’t sure about revealing the truth. Your roommate knew who he was, but you know their reaction is going to be priceless if you tell your tale. 

“Before I tell you the story I just want to say the person I was with totally isn’t my type. Just noting before I tell you who it is.”

“The fact that you have to preface this by saying that makes this more enticing,” you plant your face in your hands and let out an exhausted huff. “Now spill.”

One deep breath in, one good long exhale. 

“Do you remember our professor from the science department that we got a lot for classes? Professor Brundle- well, Seth Brundle?”

Their eyes lit up and walked into your room, now standing in front of your bed.

“Oh my God, yes! I truly still don’t know how he managed to pass me, but he adored you. He had his quirks, but he was the best.” 

You just stared at them. Just a smile on your face while you wait for the pieces to connect in their brain. For someone who has their bachelors in physics, common sense sometimes took a little bit to work. 

The eyes bug out of their head while the jaw drops. There it is. 

“NO-”

“Just hear me out, for the love of God!”

<><><>

Last night…

No way this was happening to you. You did not wear your good dress and got your hair done for you to be stood up on a date. Finance guys are the bane to womens’ existence and you were aware of that, but you had a sliver of hope this one was different. 

It’s been almost a full hour since your planned meet-up time at the popular restaurant/bar, Saoirse’s. 8 o’clock on a Friday and here you were, sitting at a bar where you used to come in your college days. With the Massachusetts Institute of Technology – or just M.I.T. – being an eight minute drive away from Saoirse’s it was a hot spot for students to invade on Saturday nights. 

The nostalgia of those days come back to you, but they’re only recent memories as you’re now almost a whole year post-grad. 23 with a full-time job at a research lab, still living with your college roommate in a small house you two are renting out, and trying to enjoy your 20s in the midst of going into the real world. 

Of course part of the stress is the attempt of making something of your love life. So far, not going too well. 

As you were about to chug your martini and leave, you saw a familiar man make his way up to the bar. His hair is now longer yet his style of suits stays the same. 

Professor Brundle, molecular physicists. 

He was your favorite professor. You two had the kind of relationship where you’d show up to his office hours to just chill out in one of the chairs and update him about your life. As time went on he grew comfortable sharing personal bits of his life to you. By senior year you had full access to his office, secretly giving you a key for when you needed alone time to destress while he wasn’t there. 

Seth knew there was something about you when it came to potential. He picked up right away that you weren’t all that afraid of challenges of what physics threw at you, but that your perfectionism could be the death of you. He would know because that was him. To save you from yourself, he paid you a bit more attention than others. His presence in your school life gave you balance to not let it all get to your sanity. 

Keeping in contact was supposed to happen, but never launched and you went your separate ways. 

“Professor Brundle?” Seth turns his head to your direction and sees you. Your off-the-shoulder dark maroon dress hugging you in all the right places, hair perfectly done, minimal makeup to showcase the beauty that speaks for itself. 

A smile slowly spreads on his face and he makes his way over to you. You hop off the tall bar chair to be able to envelope him in a hug. You forgot that there was quite a height difference, so Seth had to bend a bit. Even in your heels he still towered over you.

“How are you? How long has it been- almost a whole year? W-what are you doing here?” The shock was settling in that it really was you. 

His little secret is that he does miss seeing you. From in his classes when he’s teaching, your random appearances at his office, to walking together to his class since you were usually one of the first people to arrive. From time to time he’s debated with himself if it was a crush on you making him feel this way. He had your phone number for a whole year yet couldn’t bring himself to reach out to you. 

Now that you aren’t his student anymore, he doesn’t trust his heart on how it would feel to continue whatever bond was created. With you in front of him right now, looking the way you do, he was proving himself right. 

“I’m good! Got that position you helped me search high and low for, still living with Y/B/F/N on the outskirts of town. Ya know, just taking post-grad life one day at a time.”

“My goodness, that’s fantastic to hear. Are you expecting someone or just here alone? I know you’re one for your alone time.” you slightly blushed that he remembered such a small fact about you. What you didn’t know is that he remembered practically everything you told him about yourself. Personality characteristics, hobbies you enjoyed, interests, he clung onto every word. 

At the thought of you, Seth finds himself in a constant battle on convincing himself he never had nor will have feelings for you. 

“Well, I actually got stood up by some guy. He was supposed to be here an hour ago, but it’s whatever. It’s what I get for giving one of those douche-baggy finance types a chance.” What a fucking idiot, Seth thought to himself. If he was 23 again and got a chance with you, he would’ve hated himself if he managed to fuck it up. 

“Jeez, Y/N, I’m really sorry. Some guys just will never know a good thing when it’s in front of them, especially with someone like you.” You don’t know why his words are having such an affect on you, but the blushing comes back. Seth does notice your slight flustered demeanor and is devilishly applauding himself. 

“Are you here by yourself too?”

“Yeah. Late night at the school in my office. Finals are around the corner and I have to mentally prepare myself just as much as my students do. Well, you remember how it all goes.” you two exchange a small laugh. 

You were not about to waste this night away. Between how hot you felt and your old professor standing before you, your impulsiveness was wanting to get the best of you. 

“Would you like to get a table with me?” Seth is surprised that you asked, but can’t pass up this chance. The night was young and the universe just handed you to him on a silver platter. 

“Of course.”

<><><>

The crowd picks up after an hour passes. You stopped drinking for the night, wanting to be clear minded to catch up with Professor Brundle. The last thing you wanted was to be buzzed while talking about science with a man who’s well-known in his field for his work. 

Two waters and a plate of fries sit between you two as you go on about your cherished college memories, the good and ugly of late night studying and rowdy parties. 

“My party girl days are pretty much behind me. I now enjoy sipping and relaxing instead of chugging from a beer keg.” a hearty chuckle comes from the professor as he chews on a fry. With how well you kept your grades up, he was astonished to hear all this from you. You had people fooled that you didn’t have a life outside of your busy academic life and you were okay with that. The only expectations you had to meet were your own and that’s a rule of thumb you still stand by. 

While he went on about upcoming conventions he has to attend, you start to take him in. He took his blazer jacket off, leaving him in his white button down and gray slacks. To get more comfortable he took off his red tie and rolled up his sleeves. He did that while watching you talk about your job with a smirk on his face and it made your heart race quicken. That was a first for you in his presence.

When you were his student you knew there was no denying how handsome you thought he was. Developing full blown feelings, on the other hand, was useless to you. If you can’t act upon them, then you didn’t want them. Wasted brain space, you thought. If you were going to yearn for someone, you wanted to be able to make them yours.

But now things are completely different and he was yours for the taking. A part of you felt it was still wrong to try anything with him since he was your professor at one point. Fact of the matter is that you are no longer a student at M.I.T, no longer his student, and he was up for grabs.

You were not appreciating how your body and mind was betraying you while you observed him. The decision now was if you were going to give your senses that satisfaction. 

“No fucking shit,” you mumbled to yourself as your attention was caught by something much worse. Your date with an arm around another girl, shuffling their way through some people to get to the bar. You knew all too well that comparison is a killer of self confidence, but you couldn’t help it at the sight of the woman he had with him. 

“What’s wrong?”

“In a twist of events, my date is here with another woman.” Seth doesn’t even bother to see who the shit-head guy is. He was too busy looking at your face while you stared at the pair at the bar. It was breaking his heart seeing the look you had on your face.  

One thing about Seth is that when it comes to social skills with strangers he can be awkward at times. Right now, his anger is exceeding whatever issues he had with that. He has a terrible but hilarious idea of how to ruin that guy’s night and put a smile on your face. 

“Here, take my coat, meet me by the door.”

“Professor Brundle-”

“Trust me on this,” he stands in front of you and hands you his coat. With the both of you holding onto it, he smiles and looks into your eyes more than he should’ve. “And no more calling me Professor Brundle. You can call me Seth now,” he says and walks off. 

You don’t know why you found that so hot. All night since seeing him you’ve been trying to wrap your mind around why you’re finding your old professor so attractive to the point of seeing him as sexy. He’s not what you go for at all. You’ve never ventured with the more nerdy guys, especially older men at that. But this combo is leaving a new, sweet taste on your tongue that you could get used to. 

Your eyes spot Seth from the entrance door, talking to your date. You just hope he doesn’t embarrass you in any sort of way that could lead to making a scene. Whatever he said worked because the man looks flustered and trying to explain himself to the woman in front of him. She looks shocked and walks away from him in the opposite direction. 

“Okay, let’s get out of here!” Seth leads you out with his right hand on the small of your back. His touch left you feeling wanting more of it – everywhere else on your body. 

“What the hell did you say to him?”

“I may have pretended to know him and thanked him for an exquisite experience the other night at his place.” he mischievously smiles and you let out a cackle. Catching your breath from the laugh, you were about to open the door, but Seth beat you to it. 

“You think I’m going to let you open doors for yourself? C’mon now.” 

Jesus, guys your age you’ve encountered could never. Their chivalry has yet to kick in meanwhile Seth was as old school as they came. Unfortunately, the bar of expectations out of the men nowadays is dropping as the years roll by.

“Thank you,” a soft smirk is planted on your face while you look him in the eyes as you make your way into the car. “How’d you know that was going to work on them?” you ask him once he sits in the driver seat. 

“What I didn’t tell you is that I know of the woman he was with. One of my buddies in my department at the school, she’s his girlfriend’s friend. She is homophobic, I do not like her at all, so they got what was coming to them tonight since they both suck as people, clearly. And it’s perfect that I’m pretty sure she doesn’t even remember who I am.” He revs the engine on and you were ready to let him put his key in your ignition. 

“Oh, I meant to ask: did you want me to drop you off at your place? You’re more than welcomed to come back to my apartment too since we still have some catching up to do,” he rambled on. Not his best excuse to hide his feelings for not wanting this night to end. 

“We can go back to yours,” you say to his surprise. 

“Sounds like a plan.”

<><><>

His apartment was kind of out of the ordinary, but then again, Seth was an out of the ordinary person. The place matched him: half living space and half lab, organized but still somewhat chaotic, and cozy. 

It was a very open kind of space, but you put the pieces together that this technically wasn’t supposed to be a traditional apartment. He managed to turn what is supposed to be his lab into his apartment for the price of one. You started remembering that he has vaguely talked about this before and how bewildered you were when you found out. 

“Now how in the hell did you manage to get that piano up here?” 

“Don’t even get me started. It was a nightmare that almost landed me a broken toe,” you giggle and set your purse on the couch. “Would you like anything to drink? Water, wine, champagne I have yet to pop open?”

“Could I please have some water? No use for a perfectly good bottle of champagne to be popped when there’s nothing to celebrate.”

“We could celebrate this reunion, if we really wanted to find an excuse to have some,” he says as he hands you your water. Your hands brush and the both of you are trying to hold it together, even after such a miniscule touch. The same thought process crossed your minds’: popping the champagne can increase the chances of something happening, but you wouldn’t want to have it occur this way. Then again, self control exists. 

Yeah, you two are adults with self control that can keep this at bay. 

“Honestly, why not?” Seth widely smiles at you, then goes to get two cups of champagne. 

A few cups and some scoops of mint chocolate chip ice cream later, you two weren’t able to shut up. Various topics were discussed, geeking out on science, him explaining his teleportation ideas, the night was never ending for you two. 

His fingers work their magic with playing beautiful music on his piano. Your arm is resting atop of it with your chin on your palm, watching him. 

“Physics and piano skills, who knew?” he snorts a bit from your comment and gestures with his eyes for you to come sit next to him on the bench. You obeyed and realized how close you sat next to him until you felt your legs brushing up against each other. His cologne warps your mind for the second time that night. 

Like you thought, you have self control and this man was just your professor a year ago. 

“Do you know how to play?”

“Oh, it’s been awhile for me.”

“Let’s see that muscle memory, then,” and you start playing some keys while he’s going at it too. It sounds jumbled, but also good at the same time. It makes you giggle, this whole moment. Honestly, you felt that it was quite sweet and endearing. You two are just adults rekindling a bond that you thought you would never get to endure again with him. 

Your left hand moves on top of his right one as you two were reaching for the same keys. His skin was at the level of flower petal softness. Your mind brings that to a whole other dimension you never thought it would go when it came to Professor Brundle. The wonder of how those soft hands would feel on your bare skin. 

“Oh- I’m sorry,” you say and retreat your hand towards yourself. Maybe it was the champagne, maybe it was the pent up denial he had, but whatever it was possessed Seth to grab that same hand and bring to his lips for a kiss. 

Your heart fell in the pit of your stomach. It’s almost as if you could hear the impact of the fall.

Before you knew it, you both were leaning into each other. Self control was banging on the wall of your brain, but that little voice was muffled out. 

It went silent once Seth’s lips were on yours. 

Never has a kiss felt so wrong and right simultaneously before. It felt like every satisfying little thing coming together that can bring a smile to your face. The pop of a champagne bottle on New Years Eve. The first firework to hit the sky on the Fourth of July. The sight of the first snowfall during Winter. 

You would’ve taken him on that bench at that moment if you could. Of course, the reality was the opposite. 

You were the one to pull away, not being able to look him in the eye after what just occurred. That little voice was coming in loud and clear now. 

“I should probably get going home.”

Seth was ready to admit defeat. Wave his white flag and accept that he only got a kiss. It proved everything he was pushing away since last year and he knew it was going to drive him crazy from now on.  

Sometimes craziness can drive a person to confidence that they never knew they had. 

“You’re more than welcome to stay. And before you say anything: you can borrow my clothes to sleep in and I will gladly take the couch. Plus, who wants to take a taxi at this hour anyway?” You give him a look and he puts his hands up in defense. “I swear, this is out of pure intentions despite what we just did.”

You couldn't help but to believe him. You could just see it in his face because it was the same energy he gave you when handing you over the duplicate key to his office. Being this trusting of a man was never part of you, but Seth was the only exception. 

“Fine, you win. I request a baggy t-shirt and a pair of boxers, though.”

“Making my palace yours already?” He cracks a smile and gets up from the bench. You follow him into his bedroom area, his bed made and looking divinely comfy for you to slip in. “Here you go. One baggy top and a pair of boxers. Let me know if you need anything else, okay?” you nod and feel the heat in your neck surface from the eye contact you had with him. 

A good hour or so has passed. The place is completely dark except for the lighting shining through his windows. The ceiling has become the best place for you to stare at as you’re trying to sleep. Nothing is working – for the both of you. That kiss reigns over your thoughts’ with an iron grip. 

As expected, this led to the never ending list of questions while also pondering what exactly would’ve happened if you never broke away from the kiss. 

You were ready to find out what the night would’ve looked like if you didn’t pull away. 

You sprang out of the bed and turned the corner to go to the couch, but come face first into Seth’s chest. Before you could stumble backwards, he catches you by your waist. 

“Well hello to you too,” he says with a laugh. His hair was more curly and tad messier from the pillow he was laying on. The only thing he had on was pajama bottoms, no shirt covering his toned upper body. You had no idea what he was hiding under those suits after all these years. 

You didn’t know what to say or how to explain what you were feeling towards him. Words fell short, but you reaching up to grab his face and kissing him said everything you needed to get out. 

Seth got the memo real quick and started walking you backwards towards his bed without breaking the kiss. You fall back onto the bed, making yourself comfortable as you watch him climb over you. God, if only college you would be a fly on the wall right now. 

His head was spinning. He was focusing on you intently while trying to grasp that this was happening. You both could read each other; a cocktail of nervousness and neediness radiating. 

You connect to his lips once again, then take off the white t-shirt he let you borrow. If he was in awe of you in the dress you were wearing, then he was in heaven seeing you almost naked. 

“Jesus fucking Christ, Y/N,” he whispers, causing you to blush. 

“Like what you see?”

“How about I show you just how much I like it,” he dives back in,  going for your neck. Your fingers find their way to his hair, running them through it and tugging on it when he gets a little rough. 

His mouth trails a line of kisses from your jaw all the way down to your breasts. Seth knew not to rush his work as the outcomes never came out the way he wanted it to. Taking his time to get it just right was his forte. He was doing exactly that to your body all with his lips, now peppering kisses on your breasts, licking your nipples, and feeling up your clothed sex to build you up right where he wants you. He was starting to feel your wetness through the cotton of the boxers, a low groan escaping him at the touch. 

“Seth, this all feels fucking fantastic, but I’m losing it over here.” he looks up at your a smirk.  He’s turned into a totally different person before you.

“And what exactly do you want? I need words, baby. Can’t give you what you need without the proper instructions,” and he goes back to sucking on your nipple. Your fingers tighten their grip on his hair as you arch your back from the pleasure ripping through you. 

“I-I need you, please.”

“But you already have me-”

“Oh, you know what I mean! Fuck me!” your sexual frustrations got the best of you – as well as his obvious teasing. 

“My goodness, Y/N, you could’ve just said that,” Seth says in a mocking tone. 

He slides the boxers you were wearing down your smooth legs, having you completely naked in front of him. He’s been with gorgeous women, no doubt about that, but you just became the pinnacle of a Goddess for him. 

You left him speechless. 

His trance was broken when he felt your hands grabbing at his waistband, pulling them down. His hardened cock sprang out and your eyebrows shot up real quick. You always heard the jokes that the nerdy ones have the packages, but you weren’t a firm believer. Until now.

“Like what you see?” he asked you in a husky tone, his eyes set on yours. That sweet but serious professor you once had is temporarily dead. If this is how he is all the time in bed, you weren’t giving him up that easily. 

“Fuck yes,” and the kissing resumed, harder and rougher this time. He even bites on your bottom lip and tugs on it a bit. You were just about ready to explode. 

Right when he could feel where he needed to be, he pushed in slowly, letting you feel every inch of him. 

The ecstasy was revving up for the both of you, the want of going animalistic on each other bubbling to the surface. Each thrust Seth did, the more feral you felt yourself getting. You understood why he was being somewhat gentle, not wanting to escalate things too quickly. 

It was when he was quickening his pace that your nails had a mind of their own, scratching down his back. You knew for sure that was going to leave marks in the morning. 

“Seth, yes, yes- oh my fuck!-” he kept a hard, steady pace that was sending your eyes in the back of your head. This was sheet gripping, profanity screaming, nail scratching sex that you’ve been searching for since the first time you ever experienced it. 

He stops and flips you two, you being on top of him now. You weren’t stopping what you started and started to ride him. To get that itch from this position, you go into a squat with your feet planted on the bed. 

The light bulb went off in Seth’s brain and he makes you lift yourself a bit, then mercilessly pounds into you. The sound alone make you dizzy, but seeing the look on his face, watching himself fuck into you makes you about to snap. 

“Baby, I’m close,” you cry out, but that just fuels him to keep going. 

“You really want to come? Get those fingers down there for me, will you?” without hesitation you slip your middle finger on your very wet clit and start rubbing it. 

It didn’t take long until your orgasm hit you, your moans heightened to almost a scream. Seth was slick with sweat, but he couldn’t stop now that you were screaming his name over and over, sounding heavenly to his ears with an angel on top of him. 

He stops and lets you go back to riding him like you were. Seth sits up and starts guiding your grind by his hands on your ass. Your high is still cascading over your body, still wanting more. You place your hands on the sides of his face and make him look up at you in the eyes. 

You’re going to be mine, you thought to yourself with his hazel eyes setting you on fire. 

Between the sloppy kissing and you picking up your pace, Seth was ready to bust. 

“C’mon, professor, I know you want to come for me.” 

That little nickname was what sent him over the edge. He knew exactly what you were doing, using that out of all things to push the buttons of his twisted fantasy. Wet dreams have occurred, ones where he wasn’t proud of since you were the star of them. They started for him right before your graduation and it was that little nickname that would roll off your lips. 

Hearing it in front of him, from you of all people, had his cock twitch inside you. His grip on your ass tightened – definitely going to leave slight bruising by the morning – as he was releasing. The moans were becoming uncontrollable and he even slapped your ass from the heightened pleasure he’s felt for the first time in forever.

Seeing the state he was in, needing to hold onto you for dear life while you felt his cock twitch from coming stroked your ego a tad. Such a dominant lover turned pathetic for you was so appetizing to you. 

You climb off him and plop down on the bed, your head hitting the perfect spot on the pillow. It seemed to you your restlessness was cured. 

“Where are you going?” Seth goes to his bathroom and comes back with a small damp rag to clean you up with. 

“I am a gentleman before an animal in the sack,” and you cackle out a laugh, then he goes to help clean you up a bit. Him seeing his cum drip out of you was fuel for his cock to harden in the next five minutes. He was just praying you were wanting another round. 

You didn’t even want to know what time it was. It didn’t matter though because you were willing to fuck him until you knocked out. 

“Round two?” you asked, filling the silence of the room. 

“I thought you’d never ask,” and you laugh into the sweet, all consuming kiss he gives you. 

<><><>

Present day…

Y/B/F/N’s jaw was on the floor while their hands were covering their mouth. They were in utter shock and you just sat there, slightly disassociating at the memories of the night before.

“Do not tell me you’re having sex flashbacks in front of me right now!”

“Huh- No! Anyway, yes, it happened. Yes, it was life changing sex…and yes, I indeed fucked my old professor. Did I mention he’s 34?” and now their eyes bugged out of their head. 

They looked at you with the “okay, what happened next?” face. 

“That’s it? Nothing in the works?”

“Well-” then the phone started ringing. “Ugh, fuck, let me get that,” and you trot to the phone on the wall near the kitchen. “Hello, Y/N speaking.”

“So you did give me the right number.” His voice sends chills down your spine in such a way that you want to lean against the wall and slide down. 

“You thought I was going to give you a fake? I see how you think of me now, Brundle and I’m offended.” You can feel the cartoon hearts pop above your head after hearing his hearty laugh. He’s quickly turning you into a mush and you only spent one night with him.

“I was actually calling to see if I can take you on a proper date. We can do whatever you want, no issue, sweetheart.” you turn your head to see your roommate silently cheering you on, knowing you were on the phone with him. 

“If I really have the choice, then what I would want to do would keep us cooped up in your apartment.”

“Easy there, tiger. You’ll be getting your fixins’, don’t you worry about a thing.” you could’ve screamed from the flirtiness alone. You’re too happy and pleased that you got to unlock this side of a man who used to show his introvertedness in front of you. 

“Okay, okay, fine. We can take this slow, nothing too nice yet. Want to kick it old school and have a lunch date in your office? For old times sake?” Seth was silently celebrating while his voice gave a cool, calm, and collected answer. 

“It’s a date.”