Curate, connect, and discover
One min I know a few on Ao3.
The Trails and Tribulations of Seo Yul by Flamie
Something To Protect (And Love) by Flamie (Flamie is really out here doing the most for us Jang Uk/Naksu/Seo Yul shippers so make sure to give them lots of love if you can)
Alchemy Of Soulmates by chaosprince-apollo (CasTheButler)
There are more but those are the ones I’ve read