Yan Yu was your typical problem student during his elementary school years. He had received constant psychological blows from his class president, Chen Yifei, who also happened to be your typical model student. Feeling unresigned, Yan Yu was extremely determined to succeed, vowing to make "model students" like Chen Yifei work under "problem students" like him one day. Fast forward to many years later. Yan Yu is a successful businessman, and he could barely remember his childhood days. Unexpectedly, Chen Yifei, who was at the top in every aspect of his life, came to Yan Yu's company interview for the position as his assistant! A journey filled with only sweetness begins.