Crushed by a monotonous daily life and driven by a hidden mischievous impulse, a doctor carries out a deranged scheme—kidnapping patients and imprisoning them underground. He deceives a beautiful big-titted female patient, becoming obsessed with taming her body. For male patients suffering from ED, a busty female slave performs sweet oral sex on their lifeless groins, awakening intense pleasure. As bondage equipment appears on the scene, stimulation utilizing her large breasts and intimate flesh gradually takes control of the patients' minds and bodies. Within the secret "Stimulation Department" of a certain clinic, these special examinations provoke the patients' deepest desires, luring them into a forbidden realm of new, taboo pleasures.