The Moon Is Frost on the Ground

I, Gu Sangyue, was happy once, but, because of all the sudden things that happened later. Later, in high school, I met Cen Xiyan, a confidant who understood me very well. So, one day, I asked Cen Xiyan this question, and Cen Xiyan said that because of various reasons, they still couldn't. (This book is adapted from real life and the author's experience in reading novels. Any similarity is purely coincidental.) (Narrative order: generally chronological order, occasionally interspersed with some of my own thoughts on those things.)