Itsuki lives in a big house all on his own. One day, a foreign girl starts living at his house and things get steamy in the bathroom. Itsuki's childhood friend catches them in the act, and to Itsuki's surprise, she joins in on the fun!..
A P.E. coach is shocked when the cool, composed swimmer Tsukishima approaches him requesting he teach her all he knows about sex. Despite her antisocial leanings, she turns out to be an eager student and a fast learner when it comes to the art of lovemaking!..