Yuka raised her only son Shuichi alone, but excessive doting made him selfish, and he secretly bullied his adult classmate Hajime. When Yuka learns the truth, she apologizes on her son's behalf. Burning with revenge, Hajime refuses to forgive and demands her body as compensation, playing with and raping her. Still unsatisfied, he confronts Shuichi, who knows nothing of what happened, and presses him: "Let us borrow your mother."