After their parents' remarriage, Saya and Hinata Sakuramiya become stepsisters and soon develop a deep romantic yuri relationship that goes far beyond family bonds. Their intimate moments are captured by Tachikawa from the photography club, who uses the compromising photos to blackmail them ruthlessly. He starts by targeting the younger sister Hinata, forcing her into sexual acts, filming her deflowering, and turning her into his plaything. Worried for her beloved sister, Saya confronts the club but quickly falls into the same trap. Both sisters find themselves manipulated, coerced into increasingly extreme demands, and transformed from pure lovers into cum-covered slaves. Their days fill with repeated violations, recordings, and public exposure as the blackmailers' appetites grow. The once-passionate sisters now question how their lives spiraled into endless shame and pleasure-tinged regret. Using advanced in-motion technology, this OVA faithfully adapts Shiki Takuto's original doujinshi, bringing the intense netorare and yuri corruption to life in vivid detail.