Pathfinding 1: Story and Protagonist

Nan Minghao is a college student studying at a university in Shanghai. He was supposed to be enjoying college life, but he experienced some changes in his peaceful life. From then on, he seemed to be a different person and had symptoms of depression. During the summer vacation at the end of his sophomore year, he accidentally opened a letter he had written to himself in high school at home. He was deeply shocked by his past self, and then he mustered up a little courage and decided to complete what he had always wanted to do - write the story of high school to himself. And as for college life...