学生時代の同級生である夫と同じ教職の道を選んだ人妻・奈々。仕事も、家庭も…あの日までは順風満帆だった。その日、夫が不良生徒・浜田のイジメ現場を目撃…口論の末、夫が浜田を殴ってしまったのだ。教育と言い張る夫に対し、激昂する浜田は、その矛先を妻である奈々へと向けたのだ。後日、浜田は奈々を呼び止め、旦那のクビが嫌なら身体で償えと命じる。奈々は夫を守るため、浜田に自らの肉体を差し出すのだが…。

Nana, a married woman, chose the same path to teaching as her husband, a former classmate from her student days. Everything—her work, her family—had been going smoothly until that day. That day, her husband witnessed a delinquent student, Hamada, bullying someone… After an argument, her husband punched Hamada. Hamada, enraged by Nana's insistence that it was for the sake of education, turned his anger towards her. Later, Hamada summoned Nana and ordered her to pay with her body if she didn't want her husband fired. To protect her husband, Nana offered herself to Hamada…