Koharu-sama is known among fans as the "legendary vomit queen." A 32-year-old instructor at a prestigious athletic club in Tokyo, she leads a double life as a hardcore dominatrix. To test a man's suitability as a vomit slave, she violently hurls large amounts of vomit onto his face, completely covering his entire body. She forces him to eat the vomit that has dripped onto the floor and meticulously lick every trace of it from her panties. Koharu-sama also indulges in urophagia, adding another extreme dimension to her repertoire. Her intense and depraved acts have garnered significant attention within the fetish community.