MIYU, an adult swim-team role-player expected to compete at the national level, feels deeply self-conscious about her rapidly developing H-cup breasts. Her curvy athletic body draws unwanted attention, and secretly taken photos spread across social media. The coach she trusts with her worries turns out to be the voyeur behind it all. Obsessed with used competition swimsuits, he exposes her nipples through the wet fabric, films her breasts swaying underwater, violently mauls her tits, and subjects her to a horrifying series of sexual assaults driven by betrayal and selfish desire.