This is a secret love story about youth. There is bitterness and sweetness in it, just like a person knows when he drinks water. Only they can feel the story between Lu Yanzhi and Li Lu. When we are young, there is always a kind of boy who is particularly popular with girls. Lu Yanzhi is such a person. There are also girls who look carefree and don't care about anything, but are very insecure, fragile and awkward on the inside. Li Lu is such a person. What kind of sparks can there be between two completely different people?