Husbands who want to sleep and wives who accept their desires.Those who seek new stimulation are drowning in extraordinary excitement.Aoki and Sanada, whose wives are cousins, are on good terms as a family.Aoki, who is worried about being sexless, consults with Sanada and decides to propose "swapping" at his travel destination.Sanada's wife, Hiyori, looks sideways, and Sanada and Aoki's wife, Mirai, forget their daily lives and are violently disturbed.The impure relationship that crosses the boundaries between husband and wife escalates and transforms into a full-fledged swapping.The appearance of a bride who is fascinated by the expression of ecstasy on a stranger's stick, and the wife of another who is happy with her own cock.The banquet of the sake pond meat forest that takes place in a strange space far from everyday life drives the two couples crazy.