Nao is a married woman whose marriage is not going well. They have been married for years and the husband doesn’t care much for her anymore. She is still trying to rekindle the marriage, and one day, she finds out one swimming lesson leaflet and she decides to give it a try. She had a lot of fun in the class, and Nao was fascinated by the friendly instructor and by his kindness. This handsome instructor made her to be on the mood for sex. and when she returns home she approaches the husband for that reason, but the hubby totally ignores her. After that, and for the next swimming lesson, she wears a much more risky swimsuit…