Special work commemorating the 25th anniversary of the グローバルメディア New・Married mother と forbidden intercourse SP wife よりもお stepmother さんと aunt さんとお step sister さんの方がいいよ… Chisato Shoda, Reiko Kobayakawa, Yuki Uzukawa MOIL-001

Natsuki, her daughter, lives with her son-in-law and Chisato. Chisato and her son-in-law develop an illicit relationship. One day, Natsuki's older sister, Yuri, returns home, saying she had argued with her husband. Everyone listens to Yuri's complaints. Another day, Chisato's younger sister, Reiko, returns from Hawaii after a long absence. Yuri witnesses Chisato and her son-in-law's affair. Recently estranged, Yuri and Reiko each seduce and have sex with their son-in-law. Then, when Natsuki goes to a drinking party at work, Chisato, Reiko, and Yuri approach her son-in-law, and a four-person sex session begins…