AN: So a good response to the last chapter, enough so that I decided to get an update written up and posted today, which was also incidentally a good distraction from another update I was doing on another story that I was slightly stuck on.

That said I was surprised by how positively this was received. Especially with it not being a Saitama crack fic, which most of the other One Punch Men stories usually are. Still I appreciate the support all the same, and am glad people like the character I picked. A tough one, but not one that will be too OP and crush any and every threat that comes before him. But instead a strong hero, but one who has to think and strategise to win, and sometimes just bide his time and wait for the right moment. He's certainly a different type of hero to most. But one that I think would be quite an interesting fit to the My Heor Academia verse.

Hope you enjoy the chapter and continue reading.

Disclaimer: I do not own One Punch Man or My Hero Academia.

( - )

(Last Time)

"Oh the irony." Zombieman muttered to himself, a crooked smile on his face, even as he hit the ground moments later.

The asphalt below cracking and shattering, and veritable geyser of blood, guts, and broken bones exploded forth from his point of impact. A sea of crimson blood drenching the startled, and soon to be traumatised people around him, even as his vision once again went black.

This landing was even messier than his other ones.

It would probably take him at least three or so minutes to regenerate form this one.

( - )

Chapter 2

( - )

Sprinting across the concrete rooftop balustrade of a busy, metropolitan tower block, Kamui Woods took a running leap, clearing a good five or so metres, before he made it to the ledge of another similar sized block.

It was a magnificent leap, far beyond anything an average human would be able to do.

Despite this though, he didn't pause to celebrate.

Instead the moment his feet lightly hit the concrete on the other building, he continued to run, barely paying attention to the path ahead of him, as his gaze was instead fixed on another figure rampaging through the streets far below.

The one causing all the ruckus was a giant of a man, clearing nearly nine foot in height, with bulky shoulders and a clean shaven head and pure black eyes, both sclera and irises.

He was a villain, and he needed to be stopped.

The man's motives didn't matter to Kamui at the moment, nor did his name or identity.

The villain was destroying buildings with impunity, clearly not caring about any collateral damage, or about the danger he was putting innocent civilians in, as he instead focused entirely on battling against another Pro Hero, Death Arms.

From a single glance, Kamui could tell at once that Death Arms was on the defensive. The heavily built, grey haired man was noticeably having to keep his heavily muscled arms, part of the reason he got his name, up to protect his head.

No doubt the black and yellow manacles he wore on his wrists were helping to shield him somewhat as he used his super strength and enhanced durability to weather the bald villain's brutal assault.

Focusing on the fight for a moment as he continued to sprint along the rooftops and towards the confrontation, Kamui eyed the villain warily.

At present he didn't know the bald man's Quirk. Nor did he recognise the villain himself from memory, or know his alias, which again meant he had little information to go on as far as the man's capabilities went.

There was a possibility that there was a page on the man, on the international hero agency database. Most villains, vigilantes and Quirk extremists of any note had a bio page on the database dedicated to them.

As such logic would demand that he try to find out more about this villain before jumping in and engaging. After all if the man had a dangerous Quirk, that his own would do nothing against, then all he would be doing by jumping in, would be t just getting in the way and putting himself and others in danger.

Unfortunately however, without a name, or a Quirk, and with only a basic description, it would take too long for him to stop and try and look him up on the datapad on his hip. On top of which, this might be a new villain, one that did not have any prior crimes to his name, and thus no record on the international database.

On top of which, with the ongoing fight between Death Arm and the villains slowly escalating by the minute, putting more and more lives, and property, at stake, he didn't have time to just wait around.

It was annoying, but sometimes as a Pro Hero you had to go off of your instincts, and make risky, difficult and sometimes illogical decisions.

Some might cry that it was irrational to leap into combat without fully knowing who or what you were fighting against, but still others would say that it was worth the risk if it meant safeguarding the lives of the innocent.

Besides, Kamui rationalised to himself, Death Arms was already on site and so would already have gathered some information on the villain's capabilities, and would be able to provide backup if needed. On top of which with the amount of disturbance this was causing, he suspected that there were already other heroes on route, all of whom could provide further reinforcements if necessary.

Hopefully it wouldn't be necessary though.

Gritting his teeth behind his wooden mask at that thought, Kamui continued to run towards the fight.

He was going in. He would just have to break down and analyse what he could see of the villain right now before he engaged.

It was not ideal but it was the best he could do.

With that in mind, Kamui focused on the fight going on in the distance.

The villain's Quirk, it had to be something to do with physical strength, after all it had to be if he was able to overpower Death Arms in hand to hand combat and force him on the defensive.

That or the guy had a far more complex Quirk, something that seemed to be happening more and more often with every generation of Quirk users. In which case he would have to make an assumption that it at least boosted his strength and durability, and hope it was right.

After all he couldn't afford to tarry too long.

Not when Death Arms looked to be on his last legs.

In fact, Kamui thought worriedly, the other Pro looked like he would go down at any moment under the nonstop barrage of vicious punches and kicks from the villain.

Noticeably with each blow the villain successfully landed, an explosion of force was released, which disturbed the air around Death Arms, creating shockwaves, even as the villain drove the hero back and through the frontage of a nearby building.

The man's Quirk definitely had something to do with increased strength then, he decided. Which in turn meant that he would need to keep his distance, and not go hand to hand with the probably much stronger man.

Fortunately with his Quirk, Arbor, such a limitation wouldn't be much of a problem.

With that in mind, Kamui prepared to use his Quirk to manipulate one of his wooden arms and swing to the next building, and then get stuck in.

The fighters were still fifty odd metres away, and were back on the street again now.

All around the two fighting goliaths, Kamui could see a few civilians, a couple of stragglers, still running. Some of them seeking shelter in nearby buildings, whilst others ran for side alleys, or up the street and in the opposite direction of the fighters, scrambling through the trail of destruction that had been left behind.

He needed to move now. He needed to put a stop to this carnage before it got worse, and started costing people lives.

So far he couldn't see any bodies, but there could be some, especially if some of the damaged surrounding buildings started to collapse.

Continuing on his path, Kamui leapt down from the current building he was on, his wooden arm extending as he used it like one would a grappling hook to catch himself on a protruding flag pole, slowing his descent slightly, and allowing him to do a flip and then land lightly on his feet.

His arm turning back to normal as he landed and sank into a crouch, allowing the force from his sudden drop to flow through him and into the concrete below. His intense gaze locked on the ongoing fight, the wind whistling around him as he prepared to make his entrance.

Before he could make his move however, a new set of screams erupted from the street parallel to the ongoing fight. The sound catching his attention as he tore his eyes away from the ongoing fight for a moment, and instead looked for the disturbance.

Did the villain have a partner in crime?

Was this just a distraction?

Or maybe this was just a very unlucky day, a day in which two separate, unrelated villains, Quirk wielding criminals, decided to cause trouble, and in the same neighbourhood too!?

As it turned out however, neither of those three possibilities were correct, nor was it a traffic accident or anything of the sort.

Instead it was something much more bizarre, and perhaps more serious.

A grey skinned human figure was tumbling through the air some hundred metres above him and on the other side of the tower block to where Death Arms was fighting. Hurtling soundlessly through the air, and towards the ground below at tremendous speed.

They were on a collision course for death.

How this person came to be in such a situation, Kamui didn't know. Maybe he bailed out of a plane for some reason, and his parachute didn't deploy. Or perhaps he was trying to commit suicide and had leapt from the top of one of the surrounding skyscrapers.

Honestly though, the 'how' and 'why' didn't matter right now.

No, all that mattered was that he made his move.

Which is exactly what he did, sending a quick glance at Death Arms, Kamui estimated that the hardy hero could hold on for a few more minutes at least. This meant that he, Kamui, would be able to save the falling person, without letting the villain defeat Death Arms and endanger many more lives.

Again, it was a difficult decision, and one that a hero had to be pragmatic about. It was something that the hero academies never taught, and instead was something that was picked up through experience, pain and loss.

Sometimes a hero had to weigh up all the options and choose who to save. Sometimes they had to let one person die so that they could save a hundred others.

It was a bitter choice, and something that effected all heroes, probably even the Number One Hero, All Might.

Fortunately though this was not one of those cases.

He potentially had the time, and he had a Quirk that would hopefully allow him to both save the man, and then come back and reinforce Death Arms.

Nobody, was in an immediate peril in the vicinity around the fight, fortunately most of the civilians had run for cover or fled the area.

The ones that remained, they were in danger, yes, undoubtedly. But the villain was being kept busy for the moments, and the civilians that were still around were all now taking cover in the surrounding buildings, none of which buildings looked to be in immediate danger of collapsing.

He had time, a few minutes at most to save this guy and then swing back around to the other side of the tower block to aid Death Arms in defeating the villain.

It would be tight, but he could do it!

His estimations of his fellow hero were high, but well deserved. The other hero was a consummate professional, and a seasoned brawler. He might be overwhelmed right now, but that didn't mean that he was done quite yet. He still probably had some fight left in him, especially if it meant safeguarding innocent people's lives and livelihoods.

Making his decision only moments after he saw the falling man, Kamui lunged forward, neatly changing his path as he instead ran along the edge of the building, to the other side and leapt again. His arm once again exploding forward, the attached hand twisting and changing shape, his fingers extending and thickening into spindly branches, even as his forearm thickened and became somewhat like a gnarled tree trunk.

This would be tricky, the man was falling with a great deal of speed and momentum. If he hit the main trunk, his arm, then he would die. If he was suddenly stopped by the branches then his neck or spine might break, or be damaged.

He had to get his timing absolutely perfect.

The man fell in a grey blur, his trajectory was slightly off and his speed was greater than Kamui had estimated in the single moment he had had to analyse the situation and then act.

He was too late.

Retracting his arm back into its usual shape, Kamui closed his eyes moments after the unfortunate soul hit the ground with a sickening crunch, the asphalt below cracking and cratering, even as a geyser of viscera, bone and blood erupted forth.

The feeling of being too late was always a hard one to process.

He had done everything he could though, and had moved as fast as possible to save the person.

It just wasn't to be.

This wasn't something he could have predicted, or prepared for. He had only had barely thirty seconds to see the situation, comprehend what was happening and then act on it, it was too short a time.

He had no doubt that this failure would stick with him for a while, it would keep him up at night tossing and turning as he continually analysed his actions, and questioned whether he could have done more.

For now though he had to keep his mind focused.

Turning away from the bloody crater in the ground, and the screaming, panicking civilians, Kamui changed direction and ran for where Death Arms was still fighting against the villain. The sounds of ongoing fighting sounding out over the few shouting civilians that were still scrambling to get away, and flee from the fight.

He couldn't save the unfortunate soul that had just died, but he could still save the other people that were currently in danger.

He had to keep his head in the game.

To do otherwise would cost lives.

( - )

(A few minutes later)

Letting out a groan of discomfort, Zombieman blearily opened his eyes.

Bright light shone down on him from above, nearly blinding him as he blinked his brand new eyes for the first time. His vision slowly but surely clearing, even as he heard, rather than saw, people milling around him.

Loud voices were exclaiming in shock, fear and surprise, and softer ones were noticeably weeping or breathing heavily, hyperventilating.

No doubt his sudden landing had traumatized more than a few people.

Taking a first rasping gasp of air, he pushed himself up. Or at least he tried to, his newly formed arms shook madly as the still forming muscle snaked its way over gleaming bone, twisting and entwining to make glistening, red, sinewy muscle.

Holding back a shiver as he continued to struggle to his feet, he could feel the wind rushing around him, irritating his reconnecting nerves.

It felt coarse and harsh, like sandpaper was rubbing against his freshly grown skin.

Letting out another gasp, Zombieman spat out a mouthful of blood and with a great exertion he finally made it to his feet.

His body by this point had already nearly fully regenerated. His pallid grey flesh was once again flawless, save for the deep 'Y' shaped scar in the centre of his chest, a remnant from an autopsy he had once received prior to gaining his current regenerative abilities.

The wind continued to sting his newly formed crimson eyes as he looked around at the crowd of scared and worried looking people surrounding him, the breeze also rustling his short black hair as he focused in on one person in particular.

Calmly ignoring the exclamations of shock and worry from those around him he took a shaky step forwards. Casually wondering as he did whether the onlooker's shock was due to his sudden spate of healing, or at the fact that he was now standing in front of a crowd of strangers completely naked.

Honestly he didn't know.

Then again, nor did he really care.

Focusing on the man in front of him, he could see that he was tall, several inches taller than him in fact, and had a powerful, broad-shouldered build.

More importantly than that though, the man also had the head of a bull, complete with brownish fur, long, slightly yellowish horns which protruded from his skull, and a thick golden ring piercing through his snout.

'I've seen weirder,' Zombieman thought to himself, taking a second step forward as he started to approach the man, his gaze not on his animalistic face, but instead on the mid-thigh length black wool coat he was wearing over the top of his T-shirt and jeans.

"A-are you okay?" A blue skinned woman nearby asked nervously, her voice breaching the tense silence that had enveloped the crowd of onlookers ever since he had started moving forwards.

The sound of distance sirens, and far away shouts, screams, crashes and smashes, were also audible, though all of those present seemed to not be bothered by them, or at least not unduly, as the dozen or so people gathered, some of whom were noticeably spattered in his blood, seemed to focus concerned looks upon him instead.

Sparing the woman a glance, he gave her a curt nod and then looked away, ignoring the oddly coloured woman's concern and instead locking gazes with the nervous bull-man.

He wasn't a monster, he could tell that much from just a single glance.

He lacked the bloodthirst, and the stench of blood and violence that clung to most monsters. Instead the bull-headed man, just like the blue woman, and the other one or two odd looking people around him, all seemed to be just casual, if slightly weird looking civilians.

"I need to borrow your coat…" Zombieman stated bluntly, his calm crimson eyes boring into the taller, broader man's dark bovine ones.

"M-my coat?" The bull-man replied in confusion.

"Please sir, do you need us to call you an ambulance?" The blue woman called again.

Only for her to be answered, though not by Zombieman, but by another normal looking bystander. "Of course he doesn't, he's clearly got regenerative Quirk! We literally just saw him pull himself back together from being a stain on the ground."

Glancing sideways at the normal looking man, Zombieman noted that he, unlike some of the still hyperventilating and shaking others, was not covered in crimson gore and lumps of flesh.

In fact, instead of looking fearful, this man look fascinated.

A latecomer then, someone who managed to catch the show without being in the splash zone.

He couldn't help but wince internally at that bad analogy. It made it sound like his regenerative abilities were a gimmicky sideshow at an aquarium or waterpark.

"You don't know that! I think it is still best to call an ambulance!" The blue skinned woman replied sharply, several others nodding and voicing their agreement as she did so.

The fact that he was now alive and well, and talking, seemed to have calmed a lot of them down. Though not all, as noticeably several of them were still looking pale and scared, or had had to be taken away to calm down.

Ignoring the chatter going on around him, as several more people started arguing about his 'Quirk', whatever the hell that was, and what he should do next, he instead locked gazes with the bull man.

"I said I need to borrow your coat." He stated again, his eyes boring into the larger bull-man's eyes, making the other man falter and take a half step back at the intensity. "I'm a hero."

He didn't usually care to brag about these kind of things, or use them to benefit himself, but honestly this was an exceptional circumstance.

Currently he was stood on the edge of a bloody crater of his own making, in an unfamiliar street, and as naked as a newborn baby. If there was ever a time to use his position to leverage himself special treatment, now was the time.

"Oh, you're a hero!" One of the nearby people said, a sudden wave of understanding and muttering going through the surrounding people.

"I thought he might have been."

"I don't recognise him though."

"He's probably not that highly ranked."

"Still, if he's a Pro Hero and is acting so calm, he must be aware of his limits!"

"Oh, maybe he's here to help with that fight going on over there!"

The last person to speak, a plain featured guy with a single horn curving up from the centre of his forehead, gestured off in the direction of the ongoing noise.

Pushing down the sudden flare of annoyance he had had after being so easily dismissed as a 'low ranked', 'non-famous or recognisable hero', 'he was a fucking S-Class dammit!', he instead looked off in the direction indicated. The direction from which the shouts and crashes were coming.

Sighing a moment later, Zombie man shook his head.

Honestly, there was no rest for the wicked.

"Yeah maybe, I know the Pro Hero, Death Arms is already there, but the guy looked like he was in trouble the last I saw!" Another man chipped in.

"I'm sure he'll sort it out," Someone else replied dismissively. "It's what the Pros are paid and trained for!"

"Still, he might need some back up!" The blue skinned woman said earnestly, looking back at Zombieman now. Apparently she was one of the ones who's concern had been assuaged now that she knew that he was a hero.

"I'll head on over and check it out," Zombieman replied resignedly a few moments later, holding back the urge to roll his eyes.

These people might not recognise him, but they were right, it was the job of the heroes to protect the masses, even if said masses were surprisingly calm about the ongoing incident.

'I'm guessing it's not even a Tiger Level threat,' He thought casually to himself, as he scanned the faces of those around him. Some of them looked worried and concerned, but none of them were outright panicking about the ensuing incident which was happening on just the street parallel to them.

Then again considering the regularity of monster attacks, maybe their general lack of concern was not a surprise. Like they said, a hero always managed to sort it out in the end.

"But first," Zombieman continued, ignoring the looks of relief from some of those around him as he instead turned back to the bull-headed man. "I'm going to need your coat…, and your trousers too actually!"

In response the bull-headed man just gaped, even as some of those around him went slightly red, either due to the implications of his bizarre demand, or due to several of them once again noticing that he was standing in front of them completely, and unashamedly naked.

( - )

(A few minutes later)

Jogging along down the street a few minutes later, Zombieman gamely headed towards the ongoing fight. Only now, instead of being naked, he was instead wearing a slightly too big coat and a pair of baggy jeans that only stayed on thanks to the belt fastened tightly around his waist, and the fact that he had rolled the hems up several times so that they fit.

Wrenching a spiked, metal fencepost from the rail fence of a nearby property as he ran, he paused only long enough to test the point on his own palm, before he continued jogging.

With him soon rounding the corner of the block, only to be confronted by a scene of devastation.

The road in front of him was shattered, crack and cratered in multiple places. The frontage of several buildings looked to be on the verge of collapsing, many of them sporting broken windows and cracked walls. With one of the surrounding buildings noticeably have a massive hole in it, looking for all the world like someone had just driven a digger through it.

Thankfully he could see no bodies littering the ground, nor any civilians in immediate danger.

In fact the only sign of movement on the decimated street that he could see, was coming from three fighting and shouting figures, their voices barely audible over the sound of the rapidly approaching sirens in the distance.

Of the three, Zombieman immediately noted that two of them were working together.

One of them men had the build of a gorilla, with him having spikey grey hair, a protuberant, blunt jaw, heavily muscled arms, and black and yellow manacles around his wrists and a similarly coloured metal band on his forehead. The other one meanwhile, was a lean man who looked to be wearing a helmet, mask and costume that was made completely out of wood of all things, over the top of which he also wore some tight spandex like material.

The other one meanwhile, was a bald headed, bare-chested, giant of a man with pure black eyes and a nasty snarl on his face as he lashed out at the two men fighting him with two hammer like fists.

The bald man's every punch releasing a shockwave as he tried to clip the fast moving wooden man who deftly avoided him and seemed to keep trying to bind the bald man with a mass of wooden tendrils that he seemed to be capable of forming out of his arm.

The gorilla like man however, looking distinctly more battered than the other two, kept rushing in and attempting to grapple the large man down, when he was distracted, by wrapping his arms around his body to keep him in place.

From just a single look, Zombieman's experienced eyes were able to detect who the 'good guys' were and who the 'bad guy' was.

Though just why they were trying to capture and trap the monster, as opposed to just finishing him off, he didn't know.

Then again maybe the bald man had a regenerative ability too, or some had some other quirk to his skillset that made taking him down far more difficult than just capturing and incapacitating him.

At present he didn't have another information to make a guess as to just why these two unrecognisable, and thus probably low ranked, heroes were doing what they were.

But again, nor did he really care.

He was an S-Class hero for a reason after all, and he was currently pissed off and in need of a monster to vent his spleen on.

Smiling slightly at that, Zombieman picked up his pace from a jog to a run.

He might not know enough about the situation at the moment, but he knew exactly how he could find out more, and that was if he just got stuck in.

Hearing his approach the three men turned to look at him, all three of their faces registering surprise for a moment, before they then swiftly changed.

The grey haired man suddenly scowling and throwing a hand up in warning. "Get out of here, this isn't safe!"

The wooden man however, seemed just stare at him in confusion as he took in his pallid grey skin tone, his expression not visible from behind his mask, even if the emotion in his eyes was quite clear to see.

Apparently these two didn't recognise who he was either, the bastards!

As for the bald man, he just sneered. "Ha! Good, another hero is here to join the party!"

Taking in all these reaction as he charged in, Zombieman responded in his own way. His bare feet sliding on the cracked asphalt beneath him as he came to a stop, even as he pulled his arm back and then threw it forward, using the momentum of his sudden stop, and his own inhuman strength to fling the spiked, metal fence post in his hand forward like a javelin.

Usually he would use a slug from a Desert Eagle to announce his presence, normally by blowing a hole in the monster's head, or in one of its buddies chests, but with him not having such a weapon on hand right now, he was stuck with using whatever he could get at short notice.

Still, despite that the effect was the same.

Moments after he hurled the spear like projectile, a smile spread across his face as he saw all three men's faces twist into looks of surprise, and incredulity. The expressions freezing on their faces, even as the spear struck the startled bald man in the chest and pierced through skin and muscle, impaling the bald man through the shoulder, and coaxing a cry of shock and agony from the man in response.

Not that that made Zombieman pause for even as second, as he followed up his initial attack by crossing the final few metres between him and the gasping bald man.

Placid red eyes locking with pure black for a moment, as he smashed into the man. With him gripping the barbed metal post with one hand and wrenching it forward, eliciting a cry of pain from the still startled man, even as he drew his other arm back and unleashed a straight, and brutal punch straight into the startled man's face.

All of this happened in a barely sixty second gap, from when they saw him, to when he joined the fight.

The two 'heroes' sending him incredulous looks as he pushed on with his assault, still using the now blood soaked fence post to manoeuvre the larger man, and as leverage so he could continue deliver repetitive brutal blows to his now bloody head and face with his free hand.

The force of the blows being such that it tore the muscles in his own arms and cracked the bones in his fist and wrist as he continued to wail relentlessly on the larger man, his assault, the surprise of the attack, and the weight of his body bearing the much larger and bulkier man to the ground with a cry of anger, shock and pain.

With Zombieman landing on top of the now downed monster, one of his knees slamming squarely into his solar plexus with a dull crack, whilst the other bent the metal fence post, cracking and damaging the bone and cartilage in the monster's shoulder, eliciting yet another bellow of pain out of the man like monster.

Holding back a smile at the cries of pain, Zombie man release the spear and unleashed several more punches into the bald man's face, breaking his nose and fracturing his jaw with the force of the blows.

Following on from which he gave up on just punching, and instead gripped his head with both hands, and then began to shove his thumbs into the struggling, spasming, screaming man's eyes, blood beginning to well and pool in the sockets, and drip down the sides of his face as the grey skinned, S-Class hero decided to finish this monster once and for all.

Before he could however, he was startled to find himself hit from behind, wood tendrils exploding forth form the wooden masked hero and binding him, and not the monster, up.

Looking over to the duo of other, weaker, lower ranked, heroes in mild irritation, Zombieman ended up having to blink in surprise at what he saw.

There was a thunderous expression on the grey haired man's face, and the in fact looked like he was about ready to punch Zombieman in the face, even as the wooden man kept him bound and secure.

"What the fuck was that!" The gorilla like man bellowed, shoving passed Zombieman's now bounded up and struggling body, as he instead ran over to the writhing and screaming monster on the floor at his feet. "Were you trying to fucking kill him or something!"

Scowling and still struggling against the wooden bindings, Zombieman sent the grey haired man a flat, irritated look. "Well of course, did you expect me to leave a monster like that alive?"

( - )

AN: So a bit of a messed up and bloody debut, but one that is sure to have an impact all the same.

Hope you all enjoyed the chapter and leave a review. Though if not, ah well, thanks for trying and reading anyway. I know that these kinds of crossovers, the ones that aren't happy clappy, aren't everyone's cup of tea.

Other than that thanks for reading and I hope you all check out my other stories if you have the time. Also feel free to PM me if you have any questions, I'm usually good at answering those.

Thanks for reading, and catch you later.

Greed720.