The main character, Ryo Tatsumi, had a problem that no one could tell. He had come to see her mother-in-law, Madoka, who raised herself to college with just one woman, as one of her women. Yen took over Ryo, who lost her parents in an accident, and raised her with her own hands. One morning, Ryo learns that the circle has disappeared. Then, the maid Fumi of the Yotsuya family who visited Ryo explained his reason and was shocked. Ryo decides to entrust his body to the Yotsuya family so that he can add even a little to the repayment of the debt that Yen made to the Yotsuya family. Ryo is called to the room of Akie, the mistress of the Yotsuya family, and shows the entanglement between Akie and Fumi. Ryo also practices the daily habit of cleaning Akie’s genitals with her mouth. And Ryo is robbed of her virginity by Akie. Ryo manages his daily life as a servant, including physical service to Akie. In those days, Akie’s younger sister, Reiko, visits the mansion. Reiko seems to be interested in Ryo, and she gets involved with Ryo and embraces herself. And it was Ryo’s favorite circle that Reiko called into her room.
