Ishihara is a female teacher teaching at a school in a rural area in Japan. Her life and family were peaceful until one day two gangsters came to her house. It turned out that her younger brother had borrowed a large sum of money from them due to his gambling habits, and now they had come to the house to collect the debt. Unable to pay the debt, they started beating her skinny younger brother. Unable to bear seeing that, she came up with a way to save her pitiful younger brother by offering her body to repay the debt. Luckily, both of those men were lustful individuals, they accepted the offer and spared her brother. In difficult situations, we must do whatever it takes to save our loved ones, the ones we cherish the most - that was her sister's thought.