Yuka raised her only son, Shuichi, with her own hands. However, as a result of doting too much, Shuichi, who became selfish, was secretly bullying his classmate Hajime. After that, Yuka, who was informed of the truth, apologizes on behalf of Shuichi. Hajime, who is burning with revenge, could not forgive him, and he played with her body in exchange for atonement. Furthermore, it doesn't stop there, and he rushes to Shuichi, who doesn't know the situation, and says, "Lend me your mother ..."