Ivu Yumeshiro is a being who, driven by a desire for masochistic pleasure, wandered through fleeting encounters before ultimately being led to her master. She constantly indulges in sexual fantasies and possesses an extremely sensitive body that reaches orgasm from even the slightest stimulation. Aiming to perfect herself as a female masochist, she underwent cross-dressing and hormone therapy to feminize her body. To further enhance her beauty and masochistic appearance, she adorned her skin with lewd tattoos and pierced her nipples and navel. This painful transformation serves as a rebirth ritual for her, with the pain gradually turning into pleasure over time. Living each day immersed in masochistic ecstasy, her brain secretes intense stimulants, her breathing grows ragged, and she devours every inch of the penis—not just with her tongue, but with her nose as well, inhaling the scent of masculinity. Her vulgar, desire-filled actions perfectly embody the ultimate female masochist.