I don't know if it's what you're looking for or not.
http://www.mangago.zone/read-manga/itsuka_kimi_ni_korosareru/
No, it not it, but thanks you for helping
http://www.mangago.zone/read-manga/do_do_do_s_kyuu_kareshi/
I think this is the one!!
Yes! Yes! Thanks you very much!(≧∀≦)
No problem!!
So am looking for a yaoi manga and the story is about
The uke act like S to everyone that he know of but he actually is a M and the seme is a S and he really want to tease the uke a lot
Hope that helps you understand