Daisuke and Kenji looked at Takashi's mother, Ruri, with more than the emotion of a friend's mother. The two of them find out about Ruri's personality from Takashi, and Kenji, who finds a chance to take advantage of her, devours Ruri's body. Daisuke, who has been watching the whole story, also takes advantage of Ruri's weaknesses... Moreover, she showed Takashi her indecent appearance.
