Koi ja nai kedo (Yaoi)

The following content is intended for mature audiences and may contain sexual themes, gore, violence and/or strong language. Discretion is advised.

From Fantasyshrine:
Ever since he had sex with his childhood friend, Shinonome, the uptight Student Body VP, Yukimura, felt he was caught in a whirlwind. He found himself invaded by Shinonome in his own bedroom, in the library,everywhereâ?¦! Out of desperation, he found his only defense was to treat Shinonome coldly so he could keep his sanity intact. However, it only pushed Shinonome to go to the extremeâ?¦!! Will the head-strong, stubborn VP finally come to terms with his feelingsâ?¦!?
The series has a couple of related series and goes like this in order.
Vol 1 - Warui Koto Shitai
Vol 2 - Waruiko Demo Ii?
Vol 3 - Kirai ja nai Kedo
Vol 4 - Koi Ja nai Kedo
Oneshot - Warui Koto Bakkashite Gomennasai
Vol 5 - Warui Yatsu Demo Ii
Vol 6 - Mujihi na Otoko
Vol 7 - Warui Koibito ja Dame?