Demon Slayer: I Infiltrated the Hashira, and Muzan Begged Me Not to Kill Him

Just after transmigrating into the world of Demon Slayer, Xiu Ming is taken under Muzan Kibutsuji's control and turned into half-human, half-demon. Under the tutelage of Upper Rank One, he also learns Moon Breathing.

To break free of his restraints, however, he has no choice but to go undercover in the Demon Slayer Corps. By chance, he obtains the Super Absorption System.

As a human, he's the strongest Hashira in the Demon Slayer Corps! As a demon, the name Crescent Moon strikes terror into all who hear it!

Asakusa, Tokyo Prefecture. Inside a spacious, pitch-black room.

Muzan Kibutsuji: “Why have you come to Tokyo? Have you forgotten that you're in the Demon Slayer Corps?”

Xiu Ming: “Forgotten? You said it would take three months at first, but what happened? Three months, then another three, then another three. It's been nearly a year, boss! I've even become a Hashira in the Demon Slayer Corps!”

Muzan Kibutsuji: “You don't need to worry about any of that! Can you take out the entire Ubuyashiki family within a year?”

In the darkness, Xiu Ming's blood-red demon eyes narrowed to slits. “A year? Boss... In a year, I could make it all the way to the Infinity Castle!”