After failing her exams, Yui is sent to a strict remedial school where her teacher, Mr. Tanaka, subjects her to intense discipline. He punishes her with humiliating spankings, escalating to forceful penetration that leaves her both ashamed and secretly aroused. Yui’s body betrays her as she endures the harsh lessons, her resistance crumbling under his dominant touch, awakening a conflicted mix of pain and pleasure.