Ruka buys a new high-performance swimsuit for a four-day, three-night swim camp, only to discover that its ultra-thin fabric turns completely see-through. As the sole woman among adult performers in a youthful swim-team role-play, revealing her enormous breasts quickly draws the men's lustful attention. Knowing little beyond swimming, Ruka is easily deceived and the camp becomes filled with sex. Her wet H-cup tits cling against the transparent suit, delivering nonstop big-tit fan service.