Ugh I remember reading this tooo! I was trying to find it but no luck so far T-T
I Think it's Koishite Daddy by Kitazawa Kyou...
I WAS READING YOUR COMMENT THEN I STRAIGHT GO SEARCH FOR IT AND I FOUND ITTTTTT ε=ε=(ノ≧∇≦)ノ pardon my capslock as im super excitedddddd ╮(￣▽￣)╭
http://www.mangago.zone/read-manga/kodomo_x_otona_no_houteishiki/
I just found it too!!! Lol rereading it rite now~!
Thanks for another manga to read~! =D
Oh god, thank you very much!
Does anyone know the title of the manga that kinda had same plot like this? I mean, the son fell in love with his sensei, and had made a bit, if he ge good mark, sensei will have a date with him. Amd when he return from scgool, he accidently heard his father said, he didnt like when sensei go alone with his son on date, and the father kiss the sensei.. He just know about the sensei relationship with his father during his middle high school, and end up broken hea. Then, he decided to move to dorm with his childhood friend. And become like troblemaker to his own roommatee, who also his childhood friend (go out at night)..