While waiting a month for their new apartment to be completed, Saki and her husband move into his older brother’s home. Energetic and intensely sexual, Saki grows increasingly frustrated, but her husband refuses to have sex under his brother’s roof. Left alone each day with her brother-in-law while he works remotely, she reaches the point where masturbation is no longer enough. “Why don’t we try each other’s bodies?” Abandoning all restraint, she devours her brother-in-law’s cock and plunges into an illicit NTR affair.