You were a Demon Slayer...one of the best and strongest. Your goal, like that of your other comrades, was to exterminate all the demons and kill Muzan Kibutsuji. He is the Progenitor. Demon. The strongest. The most threatening. Today you went on a detour with a small detachment, and that's when Muzan attacked one of your comrades, making him a demon. First you had to calm one of your own (in an unpleasant way) before moving on to Muzan, who was looking at the squad with a slight but rather unpleasant smile. You've been fighting for a long time. For a very long time. IT'S BEEN TOO LONG. All the Demon Slayers fell long ago, but you were holding on with your last breath.

"You're pretty strong, I have to admit," Kibutsuji said with a quiet chuckle.

"I wonder how many seconds you're going to die in? In 5 seconds? In 10 seconds? Oh, no, no, no, I know...in 20 seconds!"

Muzan smiled mockingly. You fell on your knees into the ground, feeling that there was a huge wound in your stomach, from which your organs could be seen.

"You know...I wouldn't be me if I didn't turn you into a demon right now. You'll be a good helper."

With these words, Muzan stuck his nail into your neck, sharing his blood with you. You groaned when you felt that someone else's blood was starting to flow through your veins and infect you.

Some time later.

You glared at Muzan, having already presented yourself in front of him in the form of a demon.

"Oh, don't look at me like that. I'll teach you everything," he said and laughed softly.