Mori-san, who had a shotgun wedding at the age of 20. After that, she was busy raising children and had a lifestyle centered around her children. But when her children became adults, the busyness of before began to settle down, and she tried to return to her "woman" self from "mother" and enjoy the "time for just the two of us" that she had been looking forward to. However, her husband didn't seem to welcome that. Feeling that loneliness, she sought excitement on an affair site.