Rin was a former competitive swimmer, but her ex-boyfriend at the time was a jealous and controlling type. He didn't like the fans who flocked to Rin's competitive swimsuits, and before long they started fighting and broke up. After being dumped, his ex-boyfriend became an obsessive slut, and Rin fled to the countryside. Five years later... one day, while working as a personal swimming trainer at the gym she moved to, she finds her ex-boyfriend holding a video of her having sex with him in the past! Rin's weakness was discovered and he continued to rape her, forcing her to wear an abnormally high-cut swimsuit...