He was living a happy married life with the cheerful and lively Miho. Miho wanted to learn English for her hobby of diving, so he agreed, thinking that he wouldn't have time for himself if they had children. He then asked her to show him on his smartphone how Miho was attending English conversation classes, and saw the black instructor standing closer than necessary... Then, a few days later, she called to say she was going out to eat at the English conversation class, but when she didn't come home even after the appointed time, and she didn't answer her phone, he was so jealous and anxious that he almost went crazy...