Modern Day

Yushirou is the last demon left after the great battle between Kibutsuji Muzan and the demon-slayer corps. It's been a lot of decades, and now that it's the present time, Yushirou still holds the memories of his master, Lady Tamayo. He would always paint her and became a famous painter. 

At the gallery, you notice a woman that looks exactly like the painting . As she walked away, she passed a man who looked at her and smiled painfully. And you decided to approach the man.