They used to know each other, but lost their memory in an accident. Two school bullies, one is a real school bully, and the other is actually very good at studying. However, in order to find Xia Nan, he disguised himself as the school bully. After Xie Yun found Xia Nan, he made up his mind to tutor Xia Nan, but Xia Nan didn't listen at all. Half-mother version
Purpose: Let more people know Yuan Dan