Chen Qing, a cunning high school senior girl, is having fun in a sea of problems, and the handsome and aloof math teacher Shen Yu is her only pastime. The female top student coveted the math teacher's beauty and acted like a monster every day. When Shen Yu found that she couldn't get rid of her, she felt headache and heartache. When they met again seven years later, the top student became a white-collar worker, and the math teacher became the CEO of a financial company. Shen Yu watched Chen Qing, whose personality changed drastically, gradually return to his original self of clawing teeth and dancing, and suddenly felt that the little sheep was still easier to manage.
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