Tomoka, the mother of a teenage boy named Akira, rushes to his school after learning he has been involved in a serious assault incident. Desperate to prevent her son's expulsion, she pleads with his homeroom teacher for leniency. But the teacher offers a twisted bargain: in exchange for keeping Akira enrolled, Tomoka must submit to his sexual demands. Unbeknownst to them, Akira's troublemaking friend Yoshino secretly witnesses the encounter, threatening to expose everything and pushing the situation into even darker territory.