One day, overwhelmed by work stress and heightened desire, Tsubaki secretly masturbated in the restroom. Her department chief secretly filmed her and discovered her secret, gaining leverage to blackmail her. Helpless, she was forced to submit to him, reluctantly penetrated and tormented by his huge cock. Unable to find satisfaction in her boyfriend's premature ejaculation, her body couldn't withstand the intense G-spot stimulation and fierce thrusting—she climaxed repeatedly. With each orgasm, she became more controlled by the chief's massive member, eventually craving sex with him on her own.