A brother returns to his hometown after being dumped by his girlfriend. His sister, Kanon, embraces him to heal his broken Kokoro. The brother becomes obsessed with his sister's young and fresh body and cums inside her. However, the brother realizes that his sister is in love with him, and realizes that brother and sister can never be together, and that this must never be repeated. On the night of his departure, they make love passionately and decide to part ways with his sister.