Freelance writer Jotaro packed up his home and returned to his family house. On a hot tropical night in summer, Jotaro spied on his younger brother and his wife Kimie's activities. Unable to resist during an afternoon alone with her, he raped her. From that night onward, the two of them indulged in each other's bodies as if possessed by fever. Dripping sweat... surging desire... a dense summer affair！！！
