Yumi became the second wife of Tatsuo, an elite businessman. His son from his previous marriage, Yasuo, was troubled by the sounds of his father and stepmother having sex every night while studying for his exams, and ended up peeking into their bedroom. The next morning, when Tatsuo left the house, Yasuo could not bear it and asked Yumi to let him hold her just once. Yumi agreed, saying that she could not do so as it would interfere with his exams. After that, Yasuo visited Akemi's house with the condolence money that Yumi had asked him to give. Akemi, who had just lost her husband, indulged in masturbation in front of the portrait of the deceased. Peeking at this, Yasuo leaned over her, saying that he would comfort her. Akemi climaxed many times. Yasuo met a married woman, Emi, on a dating site and had sex with her in a hotel. In fact, Yumi, Akemi, and Emi were sisters...

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