Since divorcing her husband and living alone with her son, Sumire has been troubled by something. Her son has been directing his overflowing sexual desire towards her. She worries about what to do. "I know I shouldn't do this," she says refusing, but is overwhelmed by his momentum and opens her body. "No inside! At least do it anally!" she tells her son, opening her anal hole to him. With this film, Sumire Shiratori retires from the AV world. The final insertion is anal!