Arale, the loyal bunny girl who swore allegiance to her master, had earned absolute trust as a skilled dealer at the dark casino held in the luxurious mansion. However, after losing a game with her master's entire fortune, he lost everything, and both the mansion and Arale were handed over as collateral to cruel men, turning her into a sex slave. Despite her firm attitude, each time she is violated through intense oral service, shameful restraint toys, and impregnation devices, her reason crumbles, and she finds herself seeking pleasure, swallowing vulgar penises.