Momoko lost her husband five years ago. My daughter's happiness was the only thing that made my life worthwhile, but day by day, the way I looked at my daughter's boyfriend, Haruto, changed. - A workplace full of women, a family with only her daughter, and the only opposite sex who comes into contact with such Momoko ... However, one day, when she suppresses her feelings and indulges in masturbation because she is her daughter's boyfriend, Haruto peeps at her appearance. Haruto, who had only seen her mother, gradually became aware of Momoko. - And on the day when my daughter went out to have a dress meeting, the two crossed the line ...