Mika's son Takashi has recently been dumped by her and depressed. At that time, my aunt Yuki and her son Akira came to visit. Mika, who is worried about Takashi but can't do anything for him, asks Yuki to comfort him for her, but that later turns into something outrageous... And Mika, who has peeked at Takashi and Yuki's disturbed appearance, also seduces Akira...