Tsubomi and Satoshi are siblings who grew up together—Tsubomi, the outgoing younger sister, always looked down on her socially awkward brother, constantly bullying him in daily life. On his birthday, Satoshi gets revenge by slipping a mysterious aphrodisiac given by a friend into Tsubomi's drink. The drug quickly takes effect, robbing her of bodily control as her entire body becomes hypersensitive, causing her to involuntarily piss herself. Though she verbally resists, she can't suppress her overwhelming pleasure, moaning loudly with a dripping ahegao as she orgasms repeatedly. Her expression reveals inner turmoil and raw, unfiltered desire. #chinP