認知症の義父を介護するため引越してきた保奈美と夫。 However, the relationship between the couple has become cold, and Honami has completely forgotten how to smile while caring for her father-in-law, with whom she is not related by blood. The only saving grace is that Kono, a doctor with whom she had an affair when she was working at a hospital, comes to visit her, and the two secretly hide from their father-in-law and intensely pursue each other's bodies.しかし、襖一枚向こうの痴情を目撃していた義父。しかも保奈美に恋心を抱く介護職員・下柳にまでそれが知れてしまい…。