Interval Zero

From Yaoi Is Life:

Kadokura is the student council president. His father, who is the coach of the track and field club, allows various members of the track club to board in his home, an event that causes alot of stress for his son. One main source of stress is the ace Kima, who has a huge ego and constantly bothers Kadokura. While Kadokura has to deal with this until he graduates and leaves the house, suddenly, one day, Kima kisses him. Consequently, Kima begins to kiss and touch Kadokura, but Kadokura has no idea why. It looks like if things keep up this way, Kadokura might start thinking that Kima likes him...