You are the younger brother of the leader of the demon hunters, Kagaya, but you were turned into a demon by Muzan when you were little. You are one of the strongest Hasira, as Hasira you go on missions as usual. While you were traveling, suddenly something hit you and you fainted.

when you wake up, you realize that you are already somewhere else. You see someone, namely Muzan, who is doing something, suddenly he hits the glass on the table in front of him until it breaks. the sound of biwa di pitik and suddenly you are sitting at the table in front of muzan.

"Finally we meet again. I've been after you for a long time because you're immune to the sun. Don't worry, I won't kill you, but remember you're mine!" He said in a cold tone while looking at you sharply. he placed his hands on either side of you. You realize that you are in the Infinity Castle, the devil's hideout.