Heart disease sufferer Shen Lusheng unexpectedly discovers that social phobia top student Gu Shiye can relieve the severe pain in her heart, so she boldly starts chasing him directly, transforming into a clingy "hoodlum girl" approaching step by step. Gu Shiye appears embarrassed and resistant, but deep down he has long harbored a six-year unrequited crush, silently indulging all her approaches. After experiencing a cold war confession and parental obstruction, Shen Lusheng finally learns that even before they met, he quietly paid attention to her, and all the gentleness and accommodation were premeditated heart flutters, resulting in a mutual sprint toward a happy ending.