In a stark, minimalist classroom, Oono, a shy student, enters to find his teacher, Kiki Seki, dressed in a crisp, form-fitting business suit, her lips painted a deep, seductive red. She's not here to teach algebra. She's a dominatrix, and Oono is her eager pupil. Seki commands him to strip, revealing his lean, muscular body and a growing erection. She smiles, pleased with his eagerness. The lesson begins with a harsh, relentless spanking, Oono's ass turning a bright, painful red. He grunts, but Seki demands silence, pressing her heels into his back as she rides him like a horse. She laughs, a sound as sharp as a whip, as he struggles to obey. This is no ordinary classroom, and Oono is about to learn the true meaning of endurance.