((This is a very long special chapter [29 google docs pages, 7959 words to be exact. (ಥ ω ಥ)]. It is a flashback to Dabi and Katsuki's relationship, which ended a year before Katsuki met Shōto. It's not an alternative universe with other words.

TW: this chapter will include sexual interactions, verbal fights and rape will be mentioned. If this isn't your cup of tea, I highly suggest you not to read this chapter.))

Katsuki's POV:

Baku-bitch was apparently a nickname of mine at this point and it had only been a month since I'd been thrown into prison. The reason I was here would be because a petty little shit had the audacity to sue me for abuse because I happened to win a fight, which he picked, for the record. That pathetic excuse of an alpha had used his rich daddy to put me behind bars. How the fuck was I supposed to know he was a snotty ass rich-boy? Did he expect me to be weak and lose just because I was an omega? Proving him wrong had caused me seven months in prison, but I proudly served my sentence knowing I'd shown him where his place was.

I was the only omega inmate among all the mostly beta, but also a few alpha inmates. That wasn't my biggest problem though. One of the inmates, my cell mate to be exact, was an extremely rare dominant alpha, which had made things way more complicated for me than they had to be.

"Hey, Baku-bitch~"

I heard the most annoying inmate of them all's voice from behind me, but I simply ignored his call.

I felt his significantly larger hand grab my wrist, but I was quick to rip my hand out of his grip as I turned around to face him.

"The fuck do you want, asshole?!"

Dabi, who was the bad dominant alpha news I'd mentioned before, looked at me with a grin on his lips. He'd tried to get into my pants ever since I got here, but I'd stubbornly rejected his very direct, but never physical attempts every time. I was extremely affected by his pheromones, yes, but I just fucking hated his guts.

He could've easily forced himself onto me, but he didn't for some reason. I never knew what he was thinking, but it was clear as a day that he was looking down on me. He probably hated me just as much as I hated him, but I'd be lying if I said the attraction wasn't there. I wanted to fuck him and he wanted to fuck me, and for every day that passed by, the urge to drop my pride and fuck him was growing stronger. His scent drove me fucking insane and us sharing a cell together definitely didn't make anything better.

"No need to be so aggressive, Bakugō. I'm just checking in on you out of concern." He said, but he was obviously lying.

"What a load of crap. You're checking me out because of your sexual frustration." I corrected him. "Just grab a horny beta or something."

He chuckled.

"Nah. I'm only interested in you."

The tone in his voice was so provocatively genuine. I had no idea what his actual motive was. Did he just want to fuck me, or did he want to own me? I didn't understand him at all, both both of the alternatives was right up an alpha's alley.

"As if. You're only interested in me because I'm an omega. If another omega walked in here right now, I'd become 'that other omega guy' in the blink of an eye."

A curious glint took shape in his eyes as I uttered those words.

"No, there's something special about you that really pulls me in. At first I couldn't put my finger on what that 'something' was, but I think I've figured it out now. I won't tell you what it is though. I'll just let you know that I'm more attracted to you than any other person I've met."

Whether he was stupidly honest or a brilliant liar, was beyond me, but I didn't really care either. He and I apparently felt the same kind of overwhelming attraction for each other, and that was all I needed to know.

"Quit the sweet-talking. Actually, no; just quit talking altogether." I said with a cold tone in my voice as I pressed him up against the closest wall.

I claimed his lips with a kiss which he was quick to return. I could feel the two thin, black metal rings attached to his bottom lip against my own. Out of all his piercings, the spider-bites were my favourites; they were really sexy on him. His scent was even more pleasant up close, and I wanted more of it. I wanted him closer, as close as possible.

He placed his hands on my hips, closing the distance between us with a yank.

Shifting our positions, he dominantly pinned me to the wall, which was unexpectedly much to my liking. I brushed my fingers through his jet black hair as he unbuttoned my shirt.

Luckily, no, never mind- unfortunately, he and I were cell mates, which meant we could fool around without worrying too much. I doubted we were cell mates by chance though. He probably convinced the guards to have me transferred to his cell as his dominance was on the level where he could boss anyone around, prisoners and legitimately anyone else who wasn't a dominant alpha. No one could feel superior to him, not even the fucking alpha guards. They weren't the ones ruling the place; Dabi did. He was of the highest both biological and social rank possible. All alphas were natural leaders, but dominant alphas were the leaders of the leaders; the most superior kind of human that existed. It was impossible to disobey a dominant alpha as their pheromones were so overwhelming. They were at the absolute top of the pyramid and the few dominant alphas who existed often ended up as kings, queens, presidents or other supreme positions similar to the ones I just mentioned.

Dabi on the other hand; he was a prisoner, and most likely the only dominant alpha imprisoned in the whole world. He could easily walk out of here anytime with just a simple command, but yet he stayed. I really didn't get him at all.

I felt his lips brushing against my collarbone as my neck was off limit due to the protective collar.

I was completely captivated by his unbelievably powerful pheromones. Actually, they were so much stronger than any other pheromones I'd ever came across. They were almost too much for me to handle. Suddenly I realised that I'd take my protective collar right off if he ordered me to. I was overpowered.

I was hit by a wave of extreme anxiousness and somewhat started to come back to my senses. The absolute control he had over me frightened me to death. I couldn't trust him not to give me the command to take my collar off, and I sure as hell wasn't ready to become anyone's mate. I was only 18 years old and had my whole life in front of me. I didn't want to be tied down so young, and especially not in a fucking prison cell with a person I knew absolutely nothing about. He'd never once mentioned anything about his past. I was pretty sure his real name wasn't Dabi either. It was way too edgy to be a given name. Hell, I didn't even know his last name. There was simply no way I'd be able to mate with someone as secretive as him.

"Wait!" I exclaimed, now panicking.

He hummed in response and stopped what he was doing to meet my terrified gaze.

"I changed my mind! I don't wanna go further!"

He carefully analysed my expression, and judging by how calm he was, he probably understood the situation just by looking at my face.

"Aren't you a cruel one; giving me a boner only to back out?" He asked with a slightly humorous tone in his voice.

"I guess it can't be helped, but it sure as hell sucks to be me."

He shrugged and backed away from me.

I definitely hadn't expected him to just let me go. I'd fully prepared myself for the worst; him ignoring my wishes, forcing me into submission by using the command, which was a distinctive ability only dominant alphas possessed. It was a terrifying ability which they could use whenever they pleased to be able to control people both individually and in larger groups. I wasn't kidding when I described dominant alphas before; they really were born as ultimate leaders.

"Why are you looking so shocked? I'm not gonna force you into something just because I can. I ain't into that kinda shit. Let's just go to bed."

I could barely believe what I was hearing. Maybe he actually was a decent guy I could trust at least a little?

He went over to his futon and laid down on it.

"Stop being awkward and just go to sleep."

I blinked a couple of times in disbelief as I stood there, confused by how considerate he of all people was.

"Yeah..."

Dabi's POV:

It was in the middle of the night when I suddenly woke up to an amazingly pleasant, sweet scent and a weight on top of my lower abdomen, slightly above my crotch. It was definitely too heavy of a weight to be my cover.

I forced my eyes open to find a very familiar, ash blonde omega sitting on top of me. My vision quickly got accustomed to the darkness, and I could now tell that his cheeks were flushed red.

"Well, well~ What's this? Not a wet dream, right? That would be a boomer."

With a chuckle, I met his lustful gaze.

"Have you finally decided to trust me?" I provocatively asked.

Bakugō's breaths were heavy.

"Shut up..." He quietly growled, grinding against me.

We always ended up arguing about the dumbest things. He was bratty and I was dominant, so our personalities simply both clashed and matched at the same time in this really fucking sexy, intense way. The more he resisted, rejected and disobeyed me, the more I wanted him.

He was without a doubt in heat, which would make our situation a bit troublesome as I didn't know if I'd lose control or not. I knew I'd be able to restrain myself if he wasn't in heat, but I had no idea what would happen if I fucked him in his current state.

"Bakugō.. I don't know about this. I can't promise I won't go nuts. My mind is already getting hazy." I tried to explain as calmly as possible.

He leaned down and placed a kiss on my lips.

"It's okay. I-... I trust you.. I think..?"

I was only teasing him before when I asked him if he finally trusted me. He was terrified of me just a few hours ago because he realised how frightening a dominant alpha like myself could be. His expression gave it away; he'd definitely expected me to force him into submission earlier. He was only 18 years old, four years younger than me; there was no way I'd make him mate with me and I generally wouldn't put my hands on someone without permission as I didn't consider myself to be a human being as disgusting as that. I was a criminal asshole, yeah, but rape and forced mating was out of the fucking question.

However, his pheromones were really provocative, threatening to bring out the worst part of me. All alphas had a state called "Ferox", which was the state we experienced when our instincts took control of our minds, forcing us to abandon whatever morals we normally had. A Ferox was either triggered by a soulbond or very strong omega pheromones which typically was released by an omega in heat. Being in a Ferox could be described as an alphas "heat", but unlike heats, Feroxes didn't come in cycles.

He was probably aware of what his heat was doing to me and the risks he took, but I doubted he knew just how strong his pheromones actually were.

"Don't let me do something horrible to you, Bakugō. I don't wanna force you into anything. I'm not trustworthy right now, so if I subconsciously end up giving you a command, promise you'll fight the urge to obey it with all your fucking might. I'll do my best to prevent myself from going into a Ferox."

He nodded.

"Who do you think I am? I definitely ain't gonna let you control me, asshole! Stop underestimating me and fuck me already!" He demanded, his confidence boosting my own.

I relaxed a bit underneath him, paying attention to the war going on between my mind and my instincts.

Instinctively, I wanted to own him. The desire to sink my teeth into his nape and claim him mine was almost impossible to resist. I wanted to make him my omega, but to contradict my instincts, I had to think logically. I didn't necessarily have to mate with him in order to make him mine. I was a dominant alpha, so hypothetically, I only had to use the command to make everyone else unable to put dabs on him. That would be enough to make Bakugō mine without tying him down for the rest of our lives.

Right now, however, I simply wanted to make him feel good. I wanted to feel good myself too, but I was more of a giver than a taker, so his pleasure was my pleasure.

Bakugō proceeded to place his lips on mine, but I eagerly leaned into his kiss when he was about halfway down. I cupped his cheeks in my hands, trusting my abs to support me in the rather straining, half-sitting position.

I felt how Bakugō unbuttoned my shirt, revealing more and more of my torso with each button he opened. Once the shirt was fully unbuttoned, he pushed it off my shoulders, making me move my hands from his face to remove it completely.

His fingertips sliding down my toned abs was a sensation I'd not forget anytime soon. I shivered under his touch. It tickled a little, but it was pleasant nevertheless.

I broke the kiss for a moment and glanced up at the security camera with a sharp glint in my eyes.

"Shut the camera off and go take a coffee break." I ordered, and the red little light on the camera stopped glowing.

Bakugō brought my attention back to him with an impressed whistle.

"You really do have this place wrapped around your finger, eh?" He asked, chuckling.

"I guess. The guards are all pretty obedient and tend to avoid trouble as they're already mentally exhausted because they have to endure all the daily shit that comes with being a prison guard for a seriously crappy pay. Well, that's what makes them easier targets to manipulate than normal people. I don't even have to use the command on them anymore."

With an intrigued look in his eyes, Bakugō brushed his thumb over his lower lip.

"We're definitely continuing this conversation later. This is hella interesting. I also have a bunch of other questions for you."

I had a fair idea what those questions would be about as Bakugō was way smarter than he seemed to be due to his terrible attitude, anger-issues and hot-headed approach. I was sure he'd figured out that my real name wasn't 'Dabi' at this point, and he'd probably try to make me reveal things about my background in order to get to know me better.

"Sure deal. But for now, I'll make you feel so good you won't be able to fuck anyone else after I'm done." I replied, pretending not to know what his questions would be about.

"We'll see about that, Dabs." He suggestively whispered, pushing my torso back down to the futon before lifting his shirt over his head, discarding it to the side.

I did what I was best at, which would be taking control, and switched our positions, me now being on top of him. I slid his boxers down and placed his legs on my shoulders.

The sight in front of me was terrifyingly sexy. I was scared of losing my shit, but I'd fight fucking hell if I had to in order to keep my instincts in check.

I pulled my boxers down, noticing how Bakugō peeked down at my dick. The way his crimson eyes widened in surprise at the sight of it made me want to laugh my ass off, but I miraculously managed keep a straight face.

"Wait!" He exclaimed, suddenly getting cold feet.

I silently groaned, then looked at him, faking a slightly annoyed expression.

"First of all; that huge thing is going definitely not gonna slide right in, will it..? Second of all; did I just see a dick piercing?!"

At first I was silent, but my silence was quickly exchanged for a laugh as he was overreacting to quite a huge extent.

"It might hurt a little in the beginning, but don't worry. The pain will be over in no time, and once it is, you'll feel so good you might just grow addicted to my dick. You'll come begging for more, I'm telling you. Also, yeah. It's a frenum, one of plenty types of dick piercings. It hurt like a bitch to get."

I tried sounding as confident and chill as possible so that he'd calm down, which he thankfully did as he now seemed more intimidated by the frenum piercing rather than the size of my dick.

I did have a lot of experience, yes, but I trivialised the part about it only hurting a little. According to my previous partners, it hurt pretty damn much the first time they had sex with me. However, they'd only be in pain during the first few thrusts until I'd found the spots that made them feel so good they couldn't get enough of it.

That reminded me of something rather important... Was Bakugō a virgin..? If he was, things could get very painful for him to a start...

"Um.. Sorry to ask this out of the blue, but have you popped your cherry..?" I asked, trying my hardest not to sound awkward.

"Technically, yes..." He replied, averting his gaze.

Something was off here.

"Let me rephrase my question; have you ever taken it up the ass before?"

He snorted and rolled his eyes.

"No, but it's okay as I'm an omega in heat whose ass is currently producing a shit-ton of 'natural lubricant' because it's reacting to your pheromones. My ass is literally getting ready to take your whole cock in as we speak. That's basically what your pheromones are there for, stupid."

I knew all that, but I'd never fucked a virgin before, so I had no idea how things would play out for him.

"I get it, I get it! It might not feel as good as it does when you have experience; not that I'd know. I have no idea how it feels to be a bottom after all. Do you still want to do this, knowing that it might not feel great the first time?"

"I am, so bring it on! Also, don't bother loosening me up, my ass is way wetter than it's ever been before." He suggestively mentioned, not thinking much about the consequences.

I directed him a smirk before grabbing both his wrists with one of my hands, pinning them above his head.

"If you say so."

Bringing my dick to his indeed very wet asshole, I carefully pushed the tip in. He responded to it with a sharp inhale, but so far, it seemed like it was bearable for him.

I pushed a bit further in, causing tears escape his eyes in the process. It was a natural reaction due to all the overwhelming and unfamiliar sensations washing over him, so I didn't worry too much about it.

"Try to relax as much as possible; it'll help."

I leaned down and softly kissed his jaw, wiping his tears with my thumb while waiting for him to catch his breath and give me permission to continue.

"It hurts like hell..! I-.. I can take it though..." He said, trying to regain control over his breathing.

Bakugō was tough, I knew that from the first time I saw him. He was also extremely stubborn, and he was showing that very clearly now. His strength was beautiful, really.

"Okay! Let's get real, Dabi! Shove it all in!" He loudly exclaimed out of the blue, startling me.

"You're really no fucking joke, eh?"

I let him exhale before thrusting my whole dick inside, causing him to cry out something which sounded awfully much like my name, but he stifled his voice by biting his lower lip before I could interpret what he was saying.

"A-Ah! Dabi- It-.. It feels weird! Ngh..!"