Yuna is exhausted by her dull married life, and after her affair with a fellow teacher ends, she finds herself utterly hopeless. To her surprise, a quiet student she's always treated with calm reserve suddenly approaches her for advice. Usually well-behaved and respectful toward teachers, the moment they're alone, his demeanor changes completely. He confesses, "I can't think of anything but you, sensei," openly expressing his intense desire for her body. Though she initially resists, Yuna gradually awakens under his gentle yet bold touch. Her sense of duty and morality as an educator slowly dissolves into pleasure. As she struggles to regain control, the student's feelings grow deeper and more insistent. Caught between rising passion and ethical conflict, Yuna is forced to confront her own desires.