Rin, who had been a competitive swimmer, was once in a relationship with an ex-boyfriend who was deeply jealous and controlling. He didn't like the fans that flocked around Rin's swimwear, leading to constant fights and ultimately a breakup. The dumped ex-boyfriend turned into a stalker, forcing Rin to flee to the countryside. Five years later... while working as a swimming personal trainer at a gym in her new location, she encounters her ex-boyfriend who had forcibly taken upskirt videos of her! Held hostage by this weakness, Rin is continually subjected to abuse by her sadistic ex-boyfriend and forced to wear extremely high-cut underwear...
