My parents divorced when I was young. He went on to university and was allowed to stay at his father's house, but he had a problem. That is Sumire, my father's mistress. One day, Sumire, who works at her father's cabaret club, asks her to take a photo for promotional material. While I was being photographed, Sumire got excited and kissed me, and although I was confused since I had no experience, I was given instructions.