Saki and her son Shingo have a bad relationship, and now their relationship has become so bad that they curse each other every time they meet. On this day as well, they are in a state of taking advantage of each other, and Saki utters the phrase "I'm not popular" which makes Shingo nervous. Shingo's pride is trampled and his anger explodes. He counterattacks with physical force. Even if he tries to resist, there is no way he can resist the young man with Saki's strength. Saki will be humiliated by being forced to physically serve his child.