My playhood friend's sister and I dated the older sister, but the younger sister who has always liked me is jealous and seduces me with no bra on. Mirei Uno

The movie revolves around the complex relationships between the narrator, the older sister, and the younger sister. The narrator is in a relationship with the older sister, but the younger sister has feelings for him and tries to seduce him. This leads to a web of jealousy, desire, and unrequited love, causing tension and conflict among the characters.