Mistress Ai, a dominant Japanese doctor, delights in her patient's torment. She keeps Oono on his knees, bound by a collar and leash, as she laughs and teases him mercilessly. Her treatment involves leg-rubbing denial and spanking, all while she taunts him with her subtle, cruel words. The atmosphere is thick with tension, as Oono struggles to maintain his composure under Mistress Ai's expert, sadistic care.