It is adapted from the novel of the same name by Zaiyanwai. (Alternative title: "Half-ripe") . 

The story follows female producer-director Sang Ru, who finds herself trapped in a relationship that gives her quite a headache. During the push-and-pull romantic "game" between her and Zhou Tingzhao, she unexpectedly travels back ten years to her university days. Now with the soul of a 30-year-old, Sang Ru begins a series of "revenge" acts against the college-age Zhou Tingzhao, gradually discovering the true nature hidden beneath his outward shell. After experiencing one butterfly effect after another, the two finally gain the courage to face life head-on, healing and redeeming each other along the way.