Mizuyama discovers her husband frequenting a "communal space" where sexual desires are fulfilled without emotional baggage. In an attempt to reclaim her husband, she agrees to a deal to provide pleasure to the other tenants, provided her genitals remain off-limits. However, through intense stimulation and the use of toys, Mizuyama's resolve quickly crumbles, leading her to abandon her inhibitions and surrender completely to the collective pleasure of the group.