Ke Cai is reborn, returning to her first year of high school.
In her previous life, Ke Cai seemed lively and cheerful, but in reality she was sensitive and prone to melancholy. She was troubled by her poor grades and saddened by a relationship with him that had quietly come to an end.
After returning to the past, Ke Cai leaves her old worries behind and focuses on her studies. She becomes genuinely open and cheerful.
As she changes, her studies and life change along with her.