After 15 years of marriage, Fuyuka’s husband has lost interest and barely comes home, while even her son mocks her. She feels just as invisible in the PTA role she reluctantly accepted. Then she meets newly appointed teacher Jinno, and her world changes. Their monthly PTA meetings become a secret pleasure, and each rendezvous reveals a new side of herself through their illicit sex and creampies. She knows the affair is wrong, but she cannot surrender the happiness she has found and eagerly seeks him out again.