perhaps this one?
http://www.mangago.me/read-manga/distopia_mikansei_na_sekai/
It’s not a oneshot though but description fits so
┑(￣Д ￣)┍
It ain't a one-shot, you are mistaken http://www.mangago.me/read-manga/mobu_oji_san_demo_koi_ga_shitai/
yes thanks it never updated so i thought it was a one shot
Me too until I read the comments （￣へ￣）
its about a man who act like an npc he goes around messing with guys so another guy will finally confess to the one he messed with well this time it did not work and the uke confessed to him