Yuta runs away from his parents' house and finds himself standing in front of the entrance for the first time in a long time. His mother, who is out shopping, finds him and leads him inside the house, but his father's reaction is not encouraging. His younger sister Sawa takes him by the hand and asks him, "Why did you come back?" in the living room, but Yuta is unable to respond as he wants and is reminded of the past. He remembers the time when he blindfolded the still-naive Sawa and thrust his finger into her still-naive pussy... After dinner, when he gets into the bath, a completely naked Sawa presses her breasts against him and says, "Let's play games again." Confused, Yuta tries to hold back from climaxing as she continues to stroke his dick...