It is the story of a Lily. Their story started in 2013 and ended in × years. They had intermittent contact and have been missing each other endlessly. There were countless deletions and additions, there were sweet moments and sad moments. No one could tell whether it was friendship or love between them. She repeated "I'm sorry" over and over again, as if she could clearly see her love for you but could do nothing about it.
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.