https://www.mangago.zone/read-manga/bokura_ga_koi_wo_ushinau_riyuu/ https://www.mangago.zone/read-manga/kocchi_muite_ai/
https://www.mangago.zone/read-manga/playtime_with_hakdo/
https://www.mangago.zone/read-manga/on_this_auspicious_day/
https://www.mangago.zone/read-manga/code/
https://www.mangago.zone/read-manga/hitori_to_hitori_no_3650nichi/
Dunno. Maybe if u type unrequited love there's plenty story u can pick . Btw i just remember some manhwa about that : if you hate me so, Window to window(this story kinda funny, he has unrequited love for along time but suddenly they became sex buddies), ANTI P.T.,
dangerous convenience store (but probably you have read it)
Do you guys have any recs that has a plot like the MC is in unrequited love with his friend (or someone) then they end up getting sex buddy instead either to forget about them or because they can't forget abt them?