My wife was hospitalized, so my mother-in-law came from her hometown of Sendai to help with housework! Her skin is so lustrous and her voluptuous, attractive body so captivating that it's hard to believe she's 49 years old. Left alone together, the husband finds himself drawn to his stepmother-in-law's sensual charm. Their relationship slowly grows closer... and without telling their daughter, a new physical affair begins to bloom.