During a casual hangout, Oku reveals to his neighbor and friend Kanbayashi that he is not attracted to women and suspects he might be gay. This admission sparks a steamy night of passion between the two. Despite their intimate encounter, they behave as if it never happened. Kan moves on to date women, while Oku starts dating men. However, three years later during Christmas break, their bottled-up secrets surface, and they confront each other. This coming-of-age story follows two university students as they navigate love, sexuality, and friendship.