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Ayano, a wife who lives a modest life with her scholar husband, Mototada, and her father-in-law, Tadao. One day, a parcel was delivered to Ayano. When I opened the box with trepidation, there was an adult toy that I had never seen before in my life... Her father-in-law, Tadao, suddenly attacks Ayano, who is excited by the vibrator's obscene movements. It was all Tadao's ruse! Ayano gets raped by her husband's father. Husband and father-in-law... What is the fate of Ayano, who has been swallowed up in the whirlpool of a lascivious double life? ?