Momoko lost her husband five years ago. - Her only reason for living was her daughter's happiness, but day by day, her perspective on 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 in contact with...But one day, when she suppresses her feelings and indulges in masturbation because he's 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 for a dress meeting, the two of them crossed the line...