A couple exchange party: The first time a middle-aged couple meets each other in a hotel room who loves one another but wants to stimulate them, they are seen naked by their proud wife, embraced, jealousy, and burnt up.

The two men who have a love but the sex has become mannerized participate in a swapping party to relieve each other's frustration. There were many couples, such as a couple in the same situation or a hentai couple excited to see each other's sex. At first, I was shy and intertwined with other partners, but gradually got excited and forgot about me.