When sharp-tongued top student Cheng Che breezes into Yuncheng University with perfect scores in every subject, campus tough guy Lin Xiao's carefree sophomore year falls apart completely. On the very first day of classes, Cheng exposes his chalk-box trap in front of the whole physics class. Then, during a rooftop showdown at lunch, Cheng shoves a lemon candy so sour it makes Lin's teeth ache into his mouth. The whole scene perfectly matches the terror of being ruled by arithmetic problems when he was five.
