Shuuichi, feeling insecure about his wife Nanami’s close friendship with Shinagawa, is tricked by a colleague into visiting a brothel to boost his confidence. Nanami discovers the truth through a photo and, heartbroken, begins an affair with Shinagawa. The episode shows her gradually falling for him emotionally and physically, leading to intense sex scenes with deepthroat, paizuri, raw pounding missionary and doggystyle until creampie. In the end, Nanami leaves her husband for Shinagawa, declaring she can no longer stay with someone who betrayed her