A chaste married woman, Ryu, goes on a one-night hot spring trip with her husband and wife. She has only one problem... Her older husband has recently become ED and is starting to feel dissatisfied with her night life. At a hot spring inn on a trip, an incident that must be kept a secret from her husband occurs. She was forced into custody by bad men staying at the same ryokan. A woman's body that feels bad even though she knows it's bad. In the end, even my husband has never touched anal.