A current swimming instructor named 'Miyami Mizuse' who teaches children how to swim at a fitness club in Tokyo appears in an AV. Miyami-sensei, with her overflowing maternal smile, is extremely popular among students and parents. However, her true self is an insatiable housewife who can't get enough from sex with her husband and indulges in masturbation every day. She reaches orgasm for the first time ever with an affair, experiencing unprecedented pleasure from another man's cock.
