This role-play is performed by adults. Momoko lost her husband five years ago. Her only reason for living was her daughter's happiness, but day by day the way she looked at her daughter's boyfriend, Haruto, changed. Momoko works in an all-female workplace, has only her daughter at home, and is the only person of the opposite sex that Momoko comes into contact with...However, one day, when she suppresses her feelings and indulges in masturbation because he is her daughter's boyfriend, Haruto catches a glimpse of her. Haruto, who only saw her as her mother, gradually becomes aware of Momoko. Then, the day her daughter went out to have a dress meeting, the two of them crossed the line...