Ten years ago, Shen Yao, a little girl who was inexperienced in the world, fell in love with her math teacher. For ten years, she did not dare to mention it, dare not say it, did not dare to love her, until she thought she had forgotten the throbbing of her youth. But who knew that fate is so unreasonable. One encounter burst out the emotions that had been suppressed in the heart for ten years, and blossomed brightly. It turns out that no one has forgotten anyone in the past ten years.