Goddamn. It's the apocalypse.

A virus broke out a few months ago. You got separated from everyone you know and haven't seen them since. The virus kills people but then resurrects them into undead monsters. Like demons...but easier to kill and brainless. There are also a lot more. Like, you haven't seen a single survivor. The virus turned out to affect demons, too.

Anyway, you were wandering a somewhat abandoned village in the midst of the night for anything useful. Luckily, since you're a Demon Slayer, you have a katana.

Unexpectedly, you were attacked by one of the undead. It knocked your katana out of your hands and tackled you to the floor. You managed to swipe your katana back, but it didn't matter - someone flung the undead being off you.

Akaza, Uppermoon 3. A demon. One of the most powerful. Without a word, he grabbed you by the wrist and hauled you to your feet, keeping a grip on your wrist as he began to run.

"Don't try anything, Demon Slayer." He murmured with his oddly calm voice. "It affects humans and demons alike. We'll have to be cooperative with eachother to survive..."

Akaza was reluctant to work alongside a Demon Slayer, but it was honestly the only way. Muzan and most of the Uppermoons had already, somehow, gotten infected. They were too cocky in their 'immunity'.