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Riko Miyase is dispatched to a mansion as a housekeeper. A father and two sons live in the mansion. Riko, who was supposed to work as a live-in, was caught in the cunning of her father and eldest son and was made a slave of the father and son's sex processing. Riko continues to use her own body to sexually manipulate the owner of the mansion and her eldest son...Will the love between Riko and Yusuke come to fruition?