Worried about his mother-in-law Ayaka, who had lost her husband and was forced to live alone, Kazuya and his wife visited her parents' home. There, he caught a glimpse of Ayaka's sad and fragile expression hidden behind her smile. Seeing Ayaka with that shadow, he felt the sexiness of his second wife, even though he knew it was wrong. What could he be thinking when he has a wife? Kazuya blames himself, but he couldn't stop being drawn to Ayaka...