She is completely tight-clothed sex, drowning infidelity while still wearing her clothes.

A married woman, Saori (Sawamura Reiko), is about to have a class reunion, is sent a luxurious costume without an address. Saori, who usually only wears plain clothes, was confused, but was excited by wearing a glamorous tight dress in front of the mirror. Saori had a sense of the sender. It's my classmate Sugiura. Sugiura had had feelings for Saori since her student days. Then, when Sugiura sees Saori wearing the dress she has chosen, she is unable to suppress her out-of-control desire and pushes her down...