THE HEADQUARTERS;
The Door

On top of the small mound marking the entryway is the statue of a fox that looks to be centuries old, despite being recently created by Mana's magic...
The Entrance

This is the floor that Ibuki dumps her stuff, for the most part. If she goes out to the junkyard and bring back some neat knickknacks she'll put them here, or if she decides to put in a kitchen, this is where it'd go.
She also sleeps here, for the most part, and she's decorated it accordingly.
Some of Ibuki's music paraphernalia is scattered around this floor, but it's nothing more than spare amps and microphone equipment with a single guitar just so there's one on-hand if she wants it.
The Auditorium

Predictably the backstage is a total mess, and Ibuki doesn't really care to clean it any time soon. For some reason, she makes sure to keep none of her instruments here... probably because she knows she'd forget about them at the drop of a hat if she did.
She also likes to test her pyrotechnics here, to make sure they're crowd safe. ... It smells a bit like smoke at all times because of it.
The Arcade

There's even the less played games, like shooting hoops, run and guns, and teeny tiny indoor bowling lanes, though the balls for it are small and light to match, and the boards don't keep score all that well.
The floor is garish and the decor is just as much so, but it's got all the glory one would expect from an old arcade, minus the kids usually running around a place like this. It's kind of eerie at night, though.
Empty

Your voice and footsteps echo as you walk around the place, and if you're in here too long without some thick clothing, it can get cold enough to make your ears burn and your fingers lock up, like a crisp winter day.
Minus the sunlight and the comfort of the outdoors, of course. Considering this is a windowless cement room that's more-or-less the size of a small car park.
The Maze

Over the door that enters the maze proper are the words "LET'S PLAY" scrawled messily, ending up spreading up onto the ceiling just to fit all the letters.
The maze can be skipped, of course! Right at the front of the stairs is a trapdoor sprayed with a clown's face in orange UV paint, all locked tight with an unchangeable, 5-letter lock that seals itself after the trapdoor's been closed again.
To open the lock and get through, you either have to go to the middle of the maze and get the password from a porcelain clown that's been nailed to the wall - the password painting on its body in bright, red paint - or try and guess it yourself, but either way...
The password is L O S E R.
The Music Room

Its storeroom has a multitude of extra instruments, from kazoos to guitars to harps to cellos. As long as it's something that could fit in a high school music room's back room, it'd probably be in here.
Storage

Although, if you're really lucky, you might find some weird snacks littered around the crates... things like dried coconut, karinto, and chocolate chip jerky could all possibly be found, if you go looking.
Otherwise, all you're going to find is packing peanuts. Sorry!
The Bottom

The ventilation shaft ends here, opening up into this floor's ceiling, and stairs end the floor above, leaving you to have to try and grab for the ladder or, if you're stupid, simply jump down and hope you don't break your leg.
And for what?
Nothing.
This floor is completely void of anything - even walls. All that's lining the walls are roots and support beams, opening it up to the dirt around it.
It's literally just a dirt pit, and thanks to being the bottom, uninsulated floor, it's freezing cold.
But at least it satiates a fox's tunnelling instincts a little bit.