Ayane Sezaki is a busty beautiful married wife. The couple finally manages to have some free time and they travel together to a hot springs inn.
He made a reservation to a cheap-ass inn and he discovers he will have to actually share the place with another guest, an American man who will be staying in the nearby room.
Not a big issue, until at some point Ayane and the husband have an argument and he storms off. Huge mistake. Because then the wife moves to check the American man…
Which also leads to the hilarious ending.