After her daughter got married and left home, Misa lost her husband three years later. To cope with loneliness, she engaged in relationships with multiple men during that time. However, none of them lasted long, leaving her feeling even more lonely. One day, her daughter and son-in-law asked if they could live together, so she agreed. Now living under the same roof as her daughter and son-in-law, finding new partners has become difficult, forcing her to hide her loneliness through self-pleasure. This was discovered by her son-in-law. "Auntie, let me take care of you," he said, offering himself up to her. Despite feeling guilty, Misa couldn't resist his advances...

娘が結婚し家を出た矢先に夫に先立たれた美沙。夫を失ってからの三年間、美沙は複数人の男性と関係を持つことで寂しさを埋めようとした。しかし、誰とも長続きせず寂しさは増していくばかり。そんな折、娘夫婦から同居したいと言われ一緒に暮らすことに。娘夫婦がいるせいで新しい相手を探すのが難しく寂しさを自慰でごまかす。それを娘婿に覗かれていた。「お義母さん、俺がシテあげましょうか」罪悪感に苛まれながらも、美沙は娘婿とまぐわってしまう…