A cute and pure student, Aoi Nakashiro, approaches a tired middle-aged man on the street. The dejected middle-aged man is suspicious, but when she says, "I don't have a father, and because the father I remember was very energetic and kind, I just want to encourage people who look like sad fathers," he is handed a can of coffee bought with her meager allowance and is charmed. After meeting several times, Aoi, who has a bad nature, reverses the situation and asks for advice on her life, saying things like "I'm in a single-parent household and struggling financially." The middle-aged man who has fallen in love gives her money and offers to help. The middle-aged man is satisfied with Aoi's appearance, saying things like "I want to marry someone like an old man in the future" and thanking him with tears in her eyes. But one day, after giving her money, when he chases after her to return something she forgot, he witnesses Aoi on a date with a man. The middle-aged man, still in shock, witnesses Aoi's hidden face, laughing and saying things like "I'm doing good things because I'm getting money for making him dream," and decides to take revenge on the sexually evil bitch Aoi...
