Sukumizu ~Fetish☆ ni Narumon!~

Released under the Circus brand division 'Circus Fetish', this game focuses on school swimsuits.

The protagonist, Shimano Kanata, is a well-known swimmer in the prefecture with a fetish for water in general, and women's swim-wear in particular.
Somehow he ends up in a private girls school in a well-known beautiful mountain region. There he meets the various girls from the swimming club and the story unfolds...