The public swimming pool will be banned sooner or later. A married woman wearing a "bug-level" competitive swimsuit comes to swim three times a week. (Ye Ai DLDSS-546)

Kento, a classmate, goes to the city's swimming pool during summer vacation, but hears that a busty beauty appears there three times a week. He eagerly waits, only to find Ai, possessing unimaginably large breasts, has arrived. The two become acquainted by chance, but then their classmates, equally infatuated with Ai, appear, and a fierce battle for her affections ensues, turning the swimming pool into chaos with their insatiable lust…