Hopefully, that random green guy busts up those giant kneecaps, Denji really didn't want to cough out more of his sandwich. Chewing the damn thing took up more time than it spent in his stomach, it was going to be just so satisfying once he sliced off those drumsticks off that asshole Yakuza…

Mm… he wanted some fried chicken– damnit, did the fuckin' sandwich even digest at all? Why was he–

Denjis' ravenous thoughts were then rudely interrupted by the aforementioned asshole Yakuza dug up a piece of rubble and chucked it at Denji's location.

Lazily, Denji ducked under the thrown boulder of rubble as he slid across a chain he had previously latched onto the ground near the giant. Spinning in circles like an ice skater on his rotating chain, he leaned left and dodged another thrown piece of ground as he flipped off the birdbrain. An annoyed claw attempted to swat at Denji once he reached close enough, only for Chisaki to lose a few talons in the process.

The bleeding stumps shot out gushes of steaming blood before Chisaki even recognized the injury, blinking in an almost comical fashion, "SkKR-?!"

Jumping off the hook chain on Chisaki's bicep, Denji didn't give him a chance to recover as another chain shot out around the back of the recoiling giant, "Too clumsy, LOSER!"

Despite everything bar his rudimentary functions dissolving away in his brain, Chisaki snarled at the sight of Denji styling on him. If there was one thing the man couldn't tolerate in his life, it was disrespect.

"SkKKRRRrrRAAAAAAAAAAAAAAAGH!"

…Though it seems that Chisaki as he was now couldn't tolerate many things.

Turning much faster than his stature would have one indicate, Chisaki's hands attempted to clap the pointy bug.

Monstrous artificial veins rose to the surface of the giant's skin as Denji halted the two hands by stabbing his saws into both, holding them both at bay while forcing his rotating saws deeper into the palms of the titan, spraying Chisaki's blood everywhere.

Hearing a quiet rumble from the inside of Chisaki, Denji hastily stopped his saws and jumped out as Chisaki attempted to disassemble him into his most basic components.

"SMASH!"

…A retreat for naught however, as just before Denji leaped out of the hands trying to hydraulic press him, Izuku too had jumped on the monster's back and gave it a sharp kick in the back of its cranium. The sheer force of the impact tilted the whole mass of the bonafide behemoth forward, leading Chisaki to barely steady his feet in time and regain his senses after his brain smashed around in his skull.

Eyes turning red, Chisaki's rage had become practically physically tangible as he let loose a bloodcurdling roar that had given even Denji a momentary pause, "▂▂▅▄▂▃▅▃▃▃▄▄▄▅▄▄▄▅▅▅▅▄▅▅!"

Shaken off like a stray piece of dust on his back, Izuku had fallen off cradling his ears from the roar as Denji tensed on the ground, his planned dismemberment of the overgrown mob boss put on hold at the new development. Still, it wasn't Denji's batshit insanity that stopped him from being shaken by Chisaki's roar, it was only his thick devil metal-flesh covering his entire body that saved his ears from rupturing like all the miraculously until now undamaged windows.

Chisaki's hands bubbled and pink soft fleshy bulbous feelers shot out of the nubs Denji gave him, sharpening and curling into razor sharp keratin in mere seconds. Imperfect in color, shape, and dexterity, the former human only needed the most basic of replacements to fulfill his goal of gutting the bothersome insects facing him.

Izuku landed on the ground with a painful thud a few feet away from Denji, making the older boy scowl as he quickly grabbed him by the scruff of the neck and chucked him a city block away, "Don't make a cool fuckin' entrance then immediately clock out!"

Only slightly confused about what Denji just said, Chisaki snorted out visible steam as his crooked beak violently and loudly cracked into a straighter shape. That small warning of another impending evolution was all the time Denji had needed to immediately shoot out another chain on a building to his side to try and evade whatever the next big fuck attack was coming.

Digging his now deformed claws wrist deep into the battered cityscape, it took less than a second for Chisaki's influence to cause the ground to rumble.

"Oh sh–" Denji uttered a second before disaster.

Hundreds of grasping blocky, but still agile, hands made of concrete, rubber, glass, and other miscellaneous materials available to the freshly christened kaiju were created in an instant. Instinctually, Denji abandoned his substitute skating flatrail in a split second, moments before it was yanked down by the swarm of hands, leaving him flailing in the air.

Denji's tongue lolled out and was dragged up by the wind as he fell down, his saws in a combat ready position.

Chainsaw Man's saws slashed downwards against the outstretched arms and–

Denji heard a sound of destruction behind him for a second, momentarily causing him to pause his assault.

Then, a green blur leaped through every single hand, obliterating them.

Landing limply on the ground, Denji looked around at the scene, and then back at the boy he dismissed earlier staring at Denji. Nodding as if they just had a conversation, the seaweed face disappeared in a flash toward Chisaki.

Almost pouting, Denji crossed his arms and huffed, "Shouldn't have saved that twerp…."

Emerald light flashed in front of him.

"SMASH!"

Oh yeah, he was actually in a dangerous fight.

Sidestepping a stray piece of flying debris, something which he was getting a lot of practice today, Denji then leaped past the younger boy who had just shattered the spikes that had threatened Denji. Skidding across the ground as he did a limbo over a giant footstep that was about to squash him like a grape, two flicks from Denji's arm saws sliced open entrances in Chisaki's left foot.

A very chicken-like squawk roared out from Chisaki as he stumbled, which then created a very similar chicken reminiscent sound from Izuku as he scrambled to get out of the way like a fledgling lumberjack escaping their first timber. Thankfully he left the encounter not a pancake, as Chisaki fell face first on the rubble beside him instead of on him, making the giant growl in irritation before ripping his nails into the ground.

Denji's headlight eyes narrowed as the land underneath the gripped claws shuddered and liquefied as the giant basically did a push-up. Was he going to do anything besides just make the ground spiky?

Then, Denji saw droplets of water form in the middle of the air. …Well, that answered his question.

"This is gonna be fun…"

Cracking his neck, Denji crouched low and vanished in a burst of air seconds before the ground where he was standing had broken off into a faux sinkhole, a faint trail of dust leading from where he had been crouching to just a few feet in front of the still-on-his-stomach Chisaki.

…?

"GNnnnN?"

A spark of consciousness suddenly gained priority in the feral mind of Chisaki as the bulging and disproportionate eyeballs squinted forward, pausing the push-up.

How was the annoying, sharp, and loud man in front of him when he had just been behind him?

"Ghn–" Chisaki was interrupted by his back being sliced open, shooting out discolored blood like a geyser, "GGGGGGGGHRAAAAAAAAAAAAAAAAAK!"

Falling again, Denji leaned back and howled in laughter, saws still whirring. "BWAHAHHAHAHAHA!"

Looking back, now drenched in blood, Denji pointed to the enraged giant with his elbow, "Give 'em a concussion, greenie!"

Mouth open and his jaw nearly fallen onto the floor, Izuku gulped down his concerns and decided that the giant bird man could probably regenerate from that before flashing forward in green sparks. Illuminated in the ravaged city like a beacon, he catapulted himself forward as the muscles in his right leg strained with all their might.

This giant nearly killed Gran Torino and turned Hosu into rubble in less than a few hours. He was dangerous.

That's why Izuku had to give it his all… right now!

"SAAAAAAAAAAAAAAINNNT…..!"

Chisaki opened his bloodshot and savage eyes, and saw a green comet with a destination being his temple, pushing his strained quirk to the absolute limits, touching deep into the ground, his invisible tendrils reaching towards even the air itself–

"LLLLOOOOOOOUUUUUUIIIIIIISSSSSS… SSSSSSSMAAAAAAAAAAAAAAAAAAAAAASH!"

Chisaki's body had stayed still a small moment after the impact, even as the ground behind the boy wielding power akin to that of a thermonuclear bomb was shredded to pieces from the mere proximity of the thunderous attack.

Upon the moment of impact, adrenaline stopped being produced in Izuku's body as he felt the last of his kinetic force leave his left leg, the boys' bracers and force absorbers instantly shattering into pieces and god knows what happening more internally inside the appendage.

…Kraaack.

Chisaki's mouth foamed out blood.

Then, Chisaki's body crumpled backward as his head was flung back a city block, causing his body to do Olympic worthy backflips in the process, careening onto the empty street in the intersection. The sheer force shattered nearly every bone in his upper torso, with only the sheer size of his mass preventing it from being blown off his shoulders while simultaneously being responsible for spurting out a literal swimming pool amount of blood as he was ragdolled away from the panting boy.

…

Izuku was completely drenched in blood and slowly stared wide-eyed down at his crimson coated legs.

Cupping his hands over his mouth like Izuku was deaf, Denji shouted, "NICE! YOU TOTALLY MURDERED THAT SHITSTAIN!"

Izuku turned slightly to Denji who was jogging over jovially and felt something vile creep up his throat.

"...Did I…–Urk…!" Izuku turned a light green.

Skidding to a stop, Denji moved his hand away from his fanged mouth as he decided that whistling might be a tad wrong for the situation. The hell is wrong with this dude, did he hurt his leg or something?

While Izuku was busy emptying out his stomach, Denji walked over and gave a slightly unsure pat on the back, "Uh, good job man."

Izuku ignored it.

Looking around hesitantly, Denji shrugged, "You go… clean that up, I'll wrap things 'oer here."

…Well, he tried! He thought the dude that made his life way easier by sockin' Chisaki would be way used to blood and crap. But apparently, the guy couldn't, ugh! Aki made it look way easier to console civs, ugh.

There was some movement in the rubble.

Walking far enough down the street enough that Izuku's continued retching became faint and wasn't giving terrible flashbacks, Denji yawned. Smearing his hand on the blood on a stray piece of pulverized car, Denji (decidedly in a manner that showed he did NOT like the action) lapped the blood and gave a small sigh. Well, at least worst things worst he can just slice the guy's head off and freestyle sashimi him. Denji cocked his head after a pitiful and muffled moan of pain came under a hill of debris.

Chisaki rasped out, "Ghhhhrrahak…"

"Man, I ain't one to talk shit, but can you just go down?"

Chisaki was groaning. His forehead was quite literally split open from the sheer force and in any mundane human, the wound he was dealt with would have likely drilled through his head like an overripe watermelon. If that didn't kill him, then his mashed to goop brain and the mutilated neck would have in any reasonable world, Denji was sure.

Of course, Chisaki ceased being in Denji's books a run of a mill thug the moment he turned into a flesh tree.

"...Aaah…"

Chisaki started convulsing, the gangly and skinny limbs moving randomly as it croaked out moans of pain. The constant river of blood pouring from its mouth and scratches halted, and audible cracks began to trickle in the quiet night air. His limbs snapped in rigid and curved shapes, elongating as eyes in Chisaki rolled back.

Denji stared at the evolving giant and walked past it after shrugging.

"...!?"

Denji flung his phone near the beast, who respectively almost paused its horrific transformation in utter disbelief at his greatest annoyance ignoring him.

Giving the middle finger to the half-dozen story tall thing, Denji explained himself. "I just got a whiff of the kid I was searchin' for, and I only got ten mins to spare to look for the girl, can't be bothered killing ya. "

Chisaki stared at Denji, and then every muscle in his body twitched as–

"Gggrgrrrr…?!"

Whatever half-baked attack Chisaki was about to give was halted, as he aborted it and stood deathly still.

Something was heating up the area behind him.

"Sides, Shiggy got all pissed about me killing that hedgehog dude."

He was only half fibbin' this master plan of his. Still, he knew from experience it was hard for even topshots to tell when he was lying as Chainsaw Man.

Denji yawned a metallic breath, and then raised his hands in a circle in front of his mouth, "Oi! Flame guy! There's some green brat throwing up to Chisaki's left!"

The smoke produced from his flames faded away ever so slightly as the No. 2 hero sighed upon hearing the boy.

Endeavor snorted a puff of flame in frustration, before coating his fists in white-hot flames. "You're lucky I have to deal with this one first, villain."

Denji gave a peace sign and cackled loudly before sprinting away from the scene of the crime.

"GGGGGGGNNNNNNNAAAAAAAAAAAAAAGH!" Chisaki had turned toward the flaming man and screeched loudly in a show of intimidation, a useless one considering Endeavor's lack of reaction.

Cracking his neck, Enji gave a small point to Midoriya's location for the man's sidekicks to escape with and promptly shot a jet of flame onto the kaiju, spreading quickly as it thrashed in pain.

"Come at me, Kai Chisaki."

Locking his mind into that of the battle mindset, he readied himself for the probable tough fight, leaving behind urgent questions he had kept in his mind. Like how Nighteye had known the location for this villain despite not using his quirk like he had claimed and why the hell All Might wasn't–

"Gah… Gya… Gyahahhaha…."

Chisaki groaned and a bloodcurdling sound echoed through the ruins of Hosu as his charred skin sloughed off, leading the giant to slowly stand up painfully.

…It was a good idea to not bring Shoto with him. This fight would be too grisly for him. Still, it was hard even for him to wipe his mind of questions, new ones popping up every second he was here.

Like, for example, why did a simple drug from America turn a normal man into that of a Humarise horror story?

Usually, Denji kinda wished he didn't have such a good nose. It was pretty easy to sniff out devils and shit, but it really just made the smell of split open gore and sewage worse, badly enough that even for a devil killin' street rat like him to get a little queasy. It even made dumpster food he'd eat with no hesitation as a little kid smell awful. At least the thing came in good use whenever he was lookin' for someone with a weird scent, and the girl he was chasing smelled like a walking hospital. Not a very enjoyable scent for him to search for, either. It wasn't always like thi–

"...!" Denji slowed a tad bit before regaining momentum.

He must'a have gotten the good nose from Pochita.

Denji smiled a little before shaking his head and sped up as he nearly reached the kid.

"J…..st …ay ..ill…"

Skidding to a halt after hearing a muffled voice, Denji slowed his saws down and slowly crept around the corner of a dumpster. Checking in the reflection he saw some lanky guy in a suit– which was oddly memorable for a second– squatting in front of Magne.

Denji's muscles clenched as prepared to–

"I'm helping her."

Damn. He probably should have turned off his saws all the way before sprinting over.

Smacking the dumpster out of his way Denji walked in front of the man, whose back is now turned toward Denji's peer.

Throwing his left hand out in front of him in the air and slashing into the brick wall a decent amount, Denji barked out, "How do I know you ain't just gonna two-time us?"

The man stared into Denji uncomfortably long before sighing. Raising his hands carefully in the air as Denji reflexively began to enter his combat stance, he took off his glasses and rubbed them on his shirt. "A hero prioritizes saving a life far more than jailing a villain. Especially if said life was helping a child live."

Denji grumbled, "Whatever. Ma–The adult is my pard. I'm not gonna let you take her away cuz of some hospital bullshit, my side can probably fix what's wrong."

Sasaki stared into the reflective head of Denji, the part that's not covered in blood anyway, and slowly stepped aside before responding quietly, "But the girl?"

Denji tilted his head slightly at the girl, "..."

"Can your team help her? Can they help her better than me and the government can?"

Denji almost ground his teeth against one another after the sentence, his frustration painfully obvious to the taller man in front of him. Denji sighed before ruining his posture further as he leaned forward and stared down into the dirty alley floor.

"You saw her bandages too, correct? Do you think that a crime organization just keeps around a little girl and makes her smell like medicine and steel for fun?"

Denji gritted his teeth.

"Give me a genuine reason why you're so–"

"Cuz I don't trust you to keep her safe."

"...Why?"

Denji snorted.

…Seriously? He was going to make him say it?

"...Because if the heroes in this world were real good guys, then there wouldn't be any kids bein' kept by the Yakuza," Denji's words almost felt like vomit leaving his lips, "That good enough for you?"

Denji didn't notice Sasaki stiffening at his slip-up.

In a slow huff the hero's age showed itself as his stoic expression shifted into exhaustion, "...This operation was meant to be silent and quick. Nobody knew about the child before it was conducted, if we had done so, things would not be such a mess as of now. I assure you, that this girl won't be swept under the rug, the media would not let it. Anything related to the destruction of nearly a third of an entire city would be scooped up and thrown into the public's eye, she won't be abandoned to the darkness again. She will be kept safe."

"..."

"I swear on my life that I have done my absolute best to live up to my title as a hero, but I think you understand the capabilities of just one person. I can't stop something I don't see. That's why the only thing I can do now is to help the girl recover and prevent something similar from happening again," Sasaki softly said.

Denji stood up straight. The fighting was gonna end any second now if he was right about the fire guy.

Denji slammed his hands together, creating a storm of sparks as he held them in an x-position, "What's stopping me from slicin' you in half and running off with my partner and the kid right now then?"

The guy didn't even flinch, he was good.

"The same thing that stopped me from calling in every available hero on site the moment I heard your saws."

Denji slouched again, a newly common recurrence, his arms drooping from their stance slightly.

Sasaki continued, "My quirk. I knew you wouldn't have harmed me without a good reason."

Denji stayed silent, took a step forward, and–

"... g.. .ith ..m"

Denji paused.

A tiny voice repeated her statement. "I-I'll go with the h-hero. Please don't fight."

…He really fucked up, didn't he?

Denji crouched down slowly and sighed. Looking slightly in the direction of the small voice, he said as softly as his mechanical throat allowed, "If… If ya really want to go I won't stop you. Heros don't do that stuff."

A sniffle.

"O-okay."

Denji walked past the suited hero and slowly scooped up Magne, who was still breathing all too shallow for her own good.

"Thanks for the heal."

Sasaki nodded.

"If you hurt the kid, I'll kill you."

He nodded again.

Chainsaw Man jumped onto a roof, and Sir Nighteye finally had time to exhale his anxiety.