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Asami Shiino, the cool and quiet teacher known for her stunning looks and generous curves, is adored by her students. Despite her popularity, she remains somewhat naive. When she notices Masaki, one of her students, struggling, her concern leads her into an unexpected and compromising situation. Trying to maintain her professional demeanor, Asami finds herself masturbating Masaki, convincing herself it's "just part of the job." Even as his semen covers her, her expression stays composed. Aroused and seeing an opportunity, Masaki takes advantage of his unsuspecting teacher.