Whose Fault is this Sleepless Night (Yaoi Manga)

The Final  Night

Miyabi, who doesn't like gays and Shuhei, a gay. They spent a night together thinking this is one time coming. But they meet again and become a roommate at a boy's school dorm. Miyabi thinks something is not right. But cannot leave him out. He cannot follow Shuhei, who is pure, but saying that the feeling and sex are different. The story at a secret flower garden, the forbidden relationship at the boy's dorm!