Hopeless son Ichiro is obsessed with masturbation and refuses to study at all. With entrance exams approaching and no preparation done, his father grows desperate. As a last resort, he hires a notorious sadistic private tutor known as the "Special Mission Tutor." This teacher employs an unusual method: to prevent arousal during exams, she completely drains all semen from the penis before testing. Yui Hatano takes on the role, tasked with maximizing Ichiro's sexual desire. Using various techniques, she squeezes him dry drop by drop, but the process only heightens his excitement, leading to endless cumshot sessions. In the end, explicit sex scenes are recorded right in front of the helpless son, blending strict domination with erotic development in this intense production.