A school sex movie about Ishihara, a female teacher who teaches in a school in the countryside in Japan. Her life and her family were peaceful when suddenly one day two gangsters came to the house. When I asked, I found out that her younger brother had to borrow a large amount of money from them because of his playfulness, and now they come to the house to collect the debt. Not having enough money to pay the debt, they started beating her thin brother, seeing that scene, she couldn’t help it and thought of a way to save the poor brother that was to use her body to pay the debt. . Fortunately, both of them were greedy people, they accepted the offer and spared the younger brother. In difficult circumstances, we have to risk everything to save our loved ones, those we love the most – that’s what our older sister Rina Ishihara thought.