A wealthy young heiress, Yoshino Fukatsu, lives in a grand mansion. Beautiful and proud, she maintains a haughty, sadistic demeanor in daily life. Yet, her relationship with the butler who serves her is completely opposite—secretly, she is a twisted masochist who finds pleasure in being bound and humiliated. At clandestine BDSM gang rape parties, Yoshino's noble pussy is repeatedly violated by groups of men, while her lewd anus is savagely assaulted. Captivated by indescribable pleasure, she reaches intense, genuine orgasms again and again, her enraptured form mesmerizing to all who witness it.