I feel that today is right but yesterday was wrong.
Gu Yufei is a being who should have died long ago, but he is neither human nor ghost, wandering around the world and never leaving.
To others, Mr. Yesterday is just a lonely, indifferent person who lives in seclusion in the city.
But you cannot live without bamboo, and you cannot live without sound.
Note: This article is cold-blooded and has no CP.