Kokubunji, a Uni student with a rugged face, endures harsh training everyday in order to protect his friend, Ishibashi, who has sn angelic smile and a supple body.── During class, club activities, and on holidays, he must carefully observe Ishibashi, so that he does not face danger! For his beloved Ishibashi, Kokubunji must struggle on a daily basis! He is tested to act logically, constantly! He is in defensive war for his best friend, with the Uni's top student (with a dirty mind).