After purchasing a new apartment, Saki and her husband decide to rent it at her brother-in-law's house for one month until it is completed. Saki, who is energetic and has a strong libido, gradually becomes more and more frustrated, but her husband refuses to have sex with her, saying it's not good because it's his brother's house. During the day, Saki is left alone with her brother-in-law who is working remotely, and she can no longer endure masturbation alone... "Let's try each other's bodies out." She blows away all reason and follows her instincts as she devours her brother-in-law's dick in this adulterous NTR sex act!!!