Fukigen na Kimi to Kimagure na Kiss

Synopsis

University student Haru has had a crush on someone since high school. He is excited to be in the same university as Kunihiko, who is the coolest senior student of all, but he is constantly pushed around by his unrestrained personality. One day, he steals his precious first kiss, and when he wakes up, Kunihiko is naked next to him! And then he starts to feel conscious of him...? (Source: Frontier Works, translated)