Shion's mother remarried Ginji, the president of a mid-range company. To celebrate Shion passing the university entrance exam, the three decided to go on a trip to a hot spring area. While eating, Shion's stepfather deliberately drank alcohol, causing Shion's mother to quickly get drunk and go to the bedroom first. Shion intended to go with her mother but was held back by Ginji. He wanted to teach her experiences in love so that she would not be deceived in real life. But not only did he teach, he also wanted to practice with her. Although she wanted to fight back, Ginji threatened to end the relationship with her and her mother, and they would both have to go out on the streets and live a miserable life. Because she loved her mother, Shion tried to endure and listen to her stepfather's words. Little did she expect that the mother she loved so much promised from the beginning to give her to him, so he could repay his debt and bring a prosperous life to both of them...
