This is the story of the regrets shared by An Shiyin and Ning Shen.
After Ning Shen left, An Shiyin waited alone for spring to arrive. But her spring left with Ning Shen. All her memories remained in that winter that wasn't quite cold, and in the letter Ning Shen sent her at the end.
An alternate setting. Everything is made up. Any similarities are purely coincidental.
Theme: Treasure the present.
