One day, Kyoka (Nanami Misaki) accidentally witnesses her boss's abnormal sexual fetish and is violently silenced by being raped. She is relentlessly tormented over and over by his huge cock, his pre-cum smeared on her lips, marked with his semen. Despite feeling disgusted, she is forced to cum repeatedly. With her highly sensitive body, Kyoka becomes unable to live without her boss's giant cock. As she endures these humiliating days, her dependence on him gradually deepens...