Hoshikawa Riko, 46, is a mother of two who recently celebrated her 20th wedding anniversary. Her husband is so busy that he only comes home to sleep. They barely have any conversation, let alone sexual activity, and for a long time she has been single-handedly handling the housework and childcare. Now that her children are no longer dependent on her, this lonely battle has finally come to an end. However, as soon as she had some free time, "I couldn't stop masturbating," and she put her motherhood first...