Husbands who want to be cuckolded and their wives who accept their desires. Those seeking new excitement become immersed in the excitement of something out of the ordinary... Aoki and Sanada are close families, with their wives being cousins. Worried about a sexless marriage, Aoki consults Sanada, who suggests the much talked about "swapping" while on vacation. Glancing sideways at Sanada's wife, Hiyori, Sanada and Aoki's wife, Mirai, forget about their everyday lives and get wild with each other. Their impure relationship, which transcends the boundaries of marriage, escalates and transforms into full-scale swapping. The wife shows an ecstatic expression on her face as she watches another man's cock, while another man's wife happily sucks his own cock. The drunken orgy that unfolds in this strange space, far removed from everyday life, drives the two couples crazy...