Curate, connect, and discover
New headcanon that Atsushi isn't actually a fan of his birthdays. Especially right after he leaves the orphanage. I feel like on his b-days there things would get extra bad. The only good thing is that the other kids would avoid him instead of joining in on the harassment from the staff, and even then they'd avoid him like the plague, giving him glances that screamed they were disgusted and scared of him. The staff would double down instead. Because of this Atsushi probably didn't mention his birthday to anyone, and was hesitant about it when any of the other ADA members asked. Ranpo ofc knew, and the first time Atsushis b-day passed Atsushi walked in to see a piece of candy from Ranpos stash on his desk. Now everyone knows when it is because of that, but the most they do is take a bit of the workload off of him (AKA get Dazai to do his own work, which he doesn't argue against aside from some complaining that day), and put something on his desk, because they know celebrations make him uncomfortable.