Takeshi is staying at his relatives' house during summer vacation. He was looking forward to seeing his beloved aunt Mari, but he witnesses her having sex with his uncle. Takeshi is dejected, but when he is alone with Mari, he confesses his love for her and ends up touching her body. Seeing Mari reject him, Takeshi is even more dejected. However, when Takeshi returns home the next day, Mari approaches him and asks, "Is what I confessed yesterday true?"