A/N: Demon × Angel AU! Simple! We have Kacchan being a demon, because of course, and Kiri being an angel, because of course.

Let's go!

Bakugou's POV

"Katsuki?" my husband, called to me from the other room.

"Yes, Rourou?" I asked, uninterested as I can assume it was just him checking up on me.

Again.

"Did you do your monthly... you know..."

"No, I don't," I sighed, putting my phone down. "You gotta spit it out, honey,"

"The thing you need to do monthly to stay what you are?"

"You mean sinning?" I asked as Eijirou popped his head into the bedroom.

"Evidently not," he sighed.

Putting a clawed hand above my head, I felt the small ring floating above my shorter than normal horns.

I gave Eijirou "the look", and he covered his ears, turning away.

"Fuck God," I hissed.

A small metal ring hit me on the crown of my head as I felt my forehead ache.

"Can I turn around again?" Eijirou asked.

"You can do fucking whatever. I don't care. I don't own you," I shrugged.

Unless he wants me to.

"Katsuki, I can hear you,"

"I meant it! Whenever you're ready!"

"It'll take a bit more time,"

"Take as long as you want. We have eternity, after all," I said as Eijirou walked out.

So, if you didn't read the Author's Note at the beginning (you could literally go back up and read it now, I don't give a flying rat's ass), you would know my husband is an angel. And I am a demon.

Now, with angels and demons, there is something that happens if they do or do not sin.

If demons don't sin for a month, they begin to turn back into angels. A single sin, such as what I said earlier, is enough to bring them back to normal.

But for angels, it's much worse.

They sin once, and poof. They become a demon.

And for angels that have turned into demons, turning back is much, much harder.

The transformation is painful, takes from weeks to months to finish, and they go through an almost entire personality change.

They also look more like the demon that they first pictured.

This usually means that they turn into fucking monstrous beings, kept in hell for eons upon eons, just left to burn and rot.

It's somewhat terrifying, when you see what happens to some people.

Actually, before I met Eijirou, I was a guard at one of the worst burning cells.

This was an angel, who's first image of a demon was anything but pleasant.

Spikes sprouting from every possible spot, eyes and mouths everywhere, multiple limbs, huge gashes and melting skin that would bubble and pop.

Apparently, that transformation took four years to be complete, and that amalgamation was still in agony afterward.

Couldn't imagine what it's heats or ruts must've been like.

I would love for Eijirou to become a demon with me so he doesn't burn up on the spot upon entering hell, but at the same time, he can decide whether or not he wants to keep existing as an angel or not.

I don't want to pressure him at all. Never.

So, I will wait for him to make his decision.

If it's that he wants to become a demon, great. I'll do it in the nicest, sweetest way possible.

If he wants to stay an angel, that's fine.

I can spend the rest of my ruts alone. No big deal.

Speaking of ruts--

"Katsuki, have you taken your pills today?"

"Not yet," I sat up, getting out of bed and stretching.

I've been putting mine off since I got married.

I walked out of the bedroom and went into our kitchenette, opening up the medicine drawer.

Looking into the small orange pill bottles I saw they were both empty.

...

BOTH EMPTY?

"Uh, babe?" I chuckled nervously.

"What's up, Katsuki?"

"I... uhm... may or may not have... run out of pills," I said, rubbing the back of my neck in embarrassment.

"You wh-what?!"

"I know, I'm sorry!"

"Did you not take them yesterday and see that they were empty?"

"They're weekly pills, Eiji,"

"So you didn't bother grabbing any last week?"

"It was our anniversary, baby! 23,620,173,438 is a long time for a couple, especially of our kind," I pointed out.

"Don't try and distract me from the problem at hand, Katsuki!"

Eijirou sighed, putting his hand on his face.

"Well, I can't get them for you,"

"I know..."

"So, you're going to deal with a rut that's been suppressed for 23,612,639 years?"

"It can't be that bad!"

"Katsuki, you're going to be in a lot of pain,"

"I don't care," I shrugged.

"Go get in bed, I'll make you some soup right now. Please, try and rest. If you sleep through most of it, you might be okay,"

"Ever heard of a wet dream, Rourou?" I asked sarcastically.

"A what?"

"Nothing. More sex bullshit," I sighed.

"Go, please," Eijirou said, lightly pushing me toward the bedroom.

"Ooh, kinky,"

"Katsuki, I swear, I--"

"You'll what, angel boy?"

Eijirou deeply inhaled, muttering under his breath before sighing.

"Fuck it," he muttered.

My eyes widened.

DOES HE REALIZE WHAT THE HELL HE JUST DID!

FUCKING LUCIFER, HE'S GONNA FUCK HIMSELF OVER!

"Wait, did you seriously--"

Eijirou's lips were on mine in a less than chastise way.

For the first time, he let me slip my tongue into his mouth without a fight.

Oh my Beelzebub, he's actually gonna do it.

"If this," Eijirou pulled back, hair falling in his face as he panted. "Rut is going to be the death of you, it'll be the fucking death of me too,"

"Baby, calm down! You didn't have to do that for me at all! You're seriously ready to sacrifice yourse--"

"I've suppressed this for so damn long, Katsuki! I've been debating on doing this for at least a couple millennium! I don't care any more at this point! I'm fucking ready as I'll ever be,"

"You're asking me to--"

"Make love to me, fuck me, do whatever the hell you want! Just hurry up!"

After just staring at him, I felt myself smirk.

"Anything for my little devil,"

(A/N: No smut in here. Not yet. There are fairly innocent beings reading these, so we'll bleach this oneshot for now. I also need to stab myself in the leg real quicm, so time skip brought to you by weekly injections.)

(A/N: I pinched myself with the injector, which hurt more than the actual needle, oop--)

"That... was so... fucking worth it..." Kirishima panted beside me.

"Just so you know," I began. "Two things I oughta say. One; my rut never started, so when it does, you and I can do this a lot more. And two; why?"

"What the sudden readiness?"

"No, why is it snowing-- YES, THE SUDDEN READINESS!"

"Oh, well, like I said, was thinking about this for a while. Today was my breaking point. I used to curse a lot in my first life, which made me very surprised when I became an angel," Kirishima laughed. "Along with that, the way I pictured a demon isn't actually too bad. Looks a lot like you, actually! Long tail, cute horns, a few spikes, sharp teeth, all that!"

"Wait, really?"

"Yeah, I had seen a demon come to speak to one of the millions of gods, so I saw what they looked like before I thought of something horrendous!"

"Well, ain't you a fucking lucky one," I laughed.

"Not only that, but I was tired of being a total bottom,"

"Didn't seem tired of it when we started," I muttered.

"Hey, I was a switch back when I was human, I'm still a switch now!"

"Well, your transformation is bound to start soon. I can make you some shit and see what happens,"

"Do whatever, Katsuki. I just know I can't walk right now,"

"Heh, bottom,"

◇◇◇

Eijirou has been in our bedroom, groaning in pain for almost a week. Sometimes, you could hear his bones shifting and changing, making these sickening crunches and cracks.

It's hard to hear, your husband's form rearranging and snapping, but it'll be over eventually.

Well, the breaking and snapping ended yesterday, and he's started to groan much less.

I haven't checked in on him yet, and dealing with my rut on my own.

I was about to knock on the door, when I heard music to my fucking ears.

"Katsuki~ fuCK!"

Oh, this'll be fun.

A/N: Yeet, we finished her. I actually kinda like this AU, ngl. But yeah! Like I said, I'm not gonna do smut, at least in this book. Only because this book is only going for a week. But if y'all shitheads want some yaoi, make the request in either my Kiribaku book, or message me! Just message me the prompt, and I'll get to it! And that goes for any genre! See ya! Stay safe and healthy! - Septic / Spark