Any bl manhwa where the couple is already dating in beginning?
https://www.mangago.me/read-manga/lucky_letter/ this one, but it's tragedy, still really good!
https://www.mangago.me/read-manga/justice_judo_center/ this one has a main and sequel. In the sequel they're already dating. But I'd read the main first tbh. https://www.mangago.me/read-manga/arcade_justice/
https://www.mangago.me/read-manga/let_s_live_with_a_baby/ this one feels like they're dating even before they actually do. Maybe worth a try for you idk.
Jun didn't give a shittttt lmao he only care about getting backshot