Husbands who want to sleep and wives who accept their desires.Those who seek new stimulation are drowning in extraordinary excitement.When Nakamura, who is worried about his married life at night, consults Kondo, who has been friends for a long time, he proposes an unexpected "swapping".Nakamura hits Kondo's wife with her sexual desire, and Kondo reminds Nakamura's wife, who is not active in sex life, about her woman's pleasure.Excited by the impure friendship that transcends the marital boundaries, they finally challenge full-scale swapping.The banquet of the sake pond meat forest that takes place in a strange space far from everyday life drives the two couples crazy.