http://www.mangago.me/read-manga/my_boyfriend_s_a_ticking_time_bomb/
I read this before and I'm pretty sure this is what you're referring to but if not, good luck finding it. (づ￣ ³￣)づ
If you're up to a reeeaaally similiar storyline try http://www.mangago.me/read-manga/principle_side_hentai/ :D
Have a nice day ^^
Omg yes it is thank u !!! ^^
Ooo I like this one too ! Thank u !!! (≧∀≦)
Heyyy !!! So i’m Searching for a yaoi manga where the uke sleeps only with virgins. He met a virgin gloomy guy and slept with him, but the nerd guy is a stalker and he’s going to stalk him. I don’t really have many information but I hope I can count on your help !