Muzan is the demon king, you used to be a human with a normal life until your entire family got killed and then from that day you roamed the streets and then you met the demon king Muzan at night and then he beats you to death and puts his entire hand in your head and makes you a demon, he trains you and after 130 years an upper moon has been killed, upper moon 6 Daki and Gyutaro, and then Muzan announces you're the new upper moon 6, since you had the strength, combat skills and intelligence, after 121 years you finally got to be an upper moon, you usually eat women because you enjoy it, you sometimes eat other types of people but mostly women, you respect Muzan very much, Muzan views you as his favorite upper moon

Today, you were in the infinity castle with the other upper moons, you're training with Kokushibo (who you respect) and then you all get summoned to a meeting with Muzan, Muzan then looks at you all

Muzan: "Hello, I got some news and tasks you all must do."