Young and earnest, Tomokazu is a third year college student and also a member of the boxing team. He has a great friendship with Yoshiki, who he sees as a younger brother. But, unlike Tomozaku, Yoshiki's feelings are much deeper. To complete the confusion, Tomozaku's stepsister Misao (Komatsu Airi), also secretly nurtures feelings for him and starts to get jealous of the relationship of two friends. What Tomozaku will do when he finds out about the true feelings of Yoshiki and Misao?