So this is basically the Swap AU of KNY, where the Uppermoons and a few of the Lowermoons, who are Enmu and Rui, are Hashiras. The Hantengu clones, Sekido, Aizetsu, Karaku, and Urogi are also Hashiras, Zohakutan is separate, I just HC him being taken care by a retired Hashira. You can add your own OC, just find how to add, or change the story a bit.

Upper&Lower Moons as Hashiras!

The Vees are injured due to the recent extermination. This takes place before Charlie speaks to Adam. Vox and Velvette are hurt, but not seriously, Valentino is the most injured.

They're injured?

The Hazbin gang, the Vees and Lucifer somehow ended up in your house..

They somehow ended up in your house?

The Uppermoons and Muzan became humans? Wonder what they could be doing.
(Names that you don't know, you can Google)

Human Uppermoons

Hi there! Welcome to Here School! Where practically everyone here is not normal besides Player!

Here School!

Valentines day at the Hotel!

***Do you support Blitzø or not?***

*You/your OC was once a Harbinger, until a [scenary] happened, which lead to him/her leaving or being missing. Now you've come back.*

-𝓜𝓲𝓼𝓼𝓲𝓷𝓰 𝓗𝓪𝓻𝓫𝓲𝓷𝓰𝓮𝓻 𝓤𝓼𝓮𝓻-

There's a spy among the students and teachers.

A work trip with the crew?

Sir Pentious, Saint Peter and God

Just basically the Hashira Meeting but it's in the swapped AU.

Hashira Meeting but Swapped!

Solarballs doing their normal shenanigans

Solarballs shenanigans

This took place after a week and a half after the Moon Revolution.

Credits to @uri_ryu on TikTok for the idea!

What if the moons succeeded?

So, Charlie invited[more like forced] the Vees to the hotel for some exercises. Just to build a stronger bond between enemies.

Hazbin crew and the Vees?

!Poof!
The Hashiras have become children from a BDA!
Let's see what they're doing!
(Picture credit to @ghostbite0 on Tumblr)