Mitsuha, a teenage girl, was surprised that her vagina was bleeding for the first time and her stomach was in severe pain. She told this to her mother that she was having a big problem. Her mother smiled and rubbed her head and said: “So my daughter has grown up!”. The first time she felt uncomfortable in that sensitive area and just wanted to rub her hand on it, then she felt so comfortable. Mitsuha went online to find sex videos and followed them, making her become more and more lustful. Until one day she wanted to practice, the person she wanted to help was her stepfather.