David and Tanjiro continued to fall off the building's roof until they hit the ground on David's back.

"Ow…" David said in pain. "A normal person would've been killed by a fall like that. Definitely not something I should be doing while I'm poisoned. You okay, Tanjiro?"

"I'm sorry, I lacked concentration and got everyone hurt, even Nezuko." Tanjiro said.

"C'mon kiddo, don't blame yourself. Everyone makes mistakes." Yuzuriha said as she helped the two up.

"Besides, it's…too early to give up now." David said.

"That poison got you bad huh?" Yuzuriha asked.

"Yeah. I'm hoping we can finish up soon so Raine and Elize can get rid of this thing." David said.

"My fault or not, we need to-" Tanjiro said before tensing up. "Yuzuriha, watch out!"

Yuzuriha then barely avoided a big strike from Gyutaro, clearing away the dust as she disappeared in the haze, to reveal the entire area destroyed and on fire.

"Well, I'm impressed. I'm shocked you two are still alive after that." Gyutaro said, convinced there was no one else around. "You're pretty lucky, aren't you? Not that you two have anything going for you except being lucky."

"Luck? Heh. That ain't got nothing to do with it. We're survivors, after all." David said. "Let me tell you a little something about me. I have been at this demon slaying game longer than these non-Hashira have, maybe even longer than some Hashira. It's a curse in and of itself at this point."

"Is that so? Why haven't you become a Hashira yet if you claim to be at this for so long?" Gyutaro asked.

"Why not? Well… Let's just say I don't like being tied down like a government lapdog, and prefer to do things my own way." David said.

"You've got a lot of bravado. Which is a shame, y'know? Cause every single one of your friends could be dead or burning under the rubble. It only took one thrust to that boar's heart to kill him, meanwhile, your yellow-haired friend's trapped under the rubble with the girl that told off my sister, I think I'll leave them there to die. And that Hashira was all bark and no bite, he's dead on the ground. My poison really did get to him after all." Gyutaro said.

"Are you done?" David asked.

"What?" Gyutaro asked.

"You speak all high and mighty about how my friends are dead, but I don't see any proof. I know those guys, and it's gonna take more than a crumbling building to put them all six feet under." David said. "I mean, I jumped off that same building, poison in my guts, and still survived, didn't I?"

"Yeah, and like I said, that was impressive, but how much longer can you endure?" Gyutaro smiled. "You're good, but you've never encountered demons like my sister and me, have you? Your first battle with an Upper Rank, and you haven't even gotten close to defeating us for good."

"Yeah, I know. If a certain someone I know saw this, she'd probably come at me herself to get me to pull myself together." David said. "But I think it's about time I show you that I'm not the type to mess around."

"Oh really? And how exactly is…" Gyutaro said before he saw Tanjiro apparently try to get away. "Hey… where do you think you're going?!" he laughed as he closed the distance in an instant and knocked Tanjiro to the ground. Try as he could, he couldn't defend himself as he was so worn out, attempts to derail him futile as he was kicked in the stomach, finally stopping him.

"Oddly enough, I don't dislike either of you." Gyutaro said. "I can't help but like things that have nothing left to lose. What is it about you two? Maybe it's the scars? The desire to protect others? Or is it that demon in that box?" he mulled before smiling. "I just had a great idea! Why don't the two of you become demons? This red-haired boy can do it for her sister's sake! I can't believe I didn't think of this sooner! Become demons and I'll spare your lives, we'll be comrades then! Otherwise, I'll slaughter you both and this boy's little sister… since I don't give a damn about other people's little sisters, to be honest."

"No way, absolutely not!" Daki said. "I'm not on board with this, understand?!"

"Yeah, for once I will have to agree with her." David said. "I like my humanity the way it is now, but thanks for the offer."

"Besides…" Tanjiro panted. "We've been waiting all this time, for this moment!" he then headbutted Gyutaro right in the face, which surprisingly felled him.

"What? My body… something's wrong!" Gyutaro noticed before seeing a wisteria dipped kunai in his leg. "What?!"

"Wisteria. You demons hate the stuff, from what we've heard." David said.

"But how did that…no… your friend jabbed that kunai in my leg when he headbutted me, didn't he?! He was pretending to run away so he could grab it! And when he was defending himself, he scattered courtesan sashees to cover up the poison's scent!" Gyutaro said.

"Bingo. Got it in one." David said, clapping his hands.

"David, now's our chance!" Tanjiro said as he grabbed his sword.

"Right. Time to show this guy how I handle demons back on the streets." David said as he underwent Sapphire God: The Honorable. "It's kind of a risk undergoing this transformation with all this poison circulating, but if I really am going to die here, then I'm gonna go down fighting with no regrets! So let's get it on, Gyutaro!"

"Even after everything they've been through, why won't they give up?!" Gyutaro thought as both demon slayers invoked their respective breathing. "Why are they so determined… to decapitate me?!" he asked as they both slammed their katanas down on his neck, pressing him against the ground as if they were instilling heavy gravity on him.

"Cut through, cut through! We'll win, no matter what! We're going to win!" Tanjiro declared.

"What are you doing?! Don't get decapitated by those guys!" Daki said preparing to interfere as she coiled some obis to strike, but then Yuzuriha and Dark Water appeared out of nowhere

"You should worry more about yourself." Yuzuriha said. "Twin Moon One Blade-Style Blade-Drawing Arts Third Type: Sever!" she said, executing a sword draw strike as the obi was diced into pieces.

"So…" Dark Water typed as he came in front of his teammate to look at Daki. "Nice brother you've got there. Still, it's a little early to be having a family spat, isn't it? Especially after you've lasted this long against us."

"And besides, you're not walking away from this alive, especially after all the innocent lives you took." Yuzuriha said in a serious tone.

Daki growled. "What do you two know?! Do you even know who I am? Not only am I co-upper rank six with my brother, I was the greatest damn Oiran this pathetic district has ever seen! People like you should be demanding my respect and attention!"

"No." DW typed. "You got that backwards, silly! You demand their attention."

Daki had enough smack talk and ferociously attacked Dark Water with Obi after obi, seemingly ripping him apart, although DW wasn't even paying attention with how furious she was.

"I don't have to take this from you!" Daki yelled. "You're both ugly, pathetic, weak, and cowardly PIGS!" she screamed before DW and Yuzuriha dismantled the obi together with tentacle and sword respectively as Daki gave a big gasp at the sight of DW still alive.

"Ugly? Have you looked in a mirror?" Yuzuriha said as DW started to reform.

"Eh, I don't know, Yuzuriha. In any other situation, she might've had a point there. Except I was made in a lab, from Octoling and human DNA, I've killed a mako shark, and I don't even know what my phobias are. So in other words, Ms. Daki…" Daki attempted one last obi attack, but Yuzuriha cleared the path for Dark Water to get in real close, fist gripped as one of his eyes glowed red. "Ch-Ch-Ch-CHECK YOUR PRIVILEGE!" That voiceover line accompanied DW as he punched Daki in the face so hard, she was launched into the air, almost out of her geta.

"Let's see how you like this!" Yuzuriha said, doing an elegant slash before slicing through Daki three times as she yelled. "Aku, Zoku, Zan!" she said as bindings from her embroidery jacket wrapped around Daki before ending with a re-sheathing slash as she descended out of the air.

"If you think that's gonna kill me, you're out of your mind!" Daki said healing from the slashes.

"Don't worry! We were just the opening act!" DW typed as just then, Zenitsu and Sectonia burst out of the rubble nearby.

"That brat and the ice kid's girlfriend! They pulled themselves out of the rubble!" Daki said, trying to get at them, but they were too fast.

"Are you ready?" Sectonia asked as she electrified herself. "Breath of Thunder, Fourth Form: Voltaic Crash!" she said as she charged at Daki, ramming into her, pushing her back, and leaving electricity sparking on her body.

"Why you…!" Daki said as she pulled away, but found she couldn't move at all. "What… I can't move!"

"Breath of Thunder: Eighth Form: 200,000 Volt Pillar!" Sectonia said as she sliced at Daki, a surge of lightning exploding from under Daki, keeping her in place.

"So powerful…!" Daki thought. Even though she had turned her neck into obi, the sheer force behind the attack was causing it to bend.

"Damn it, it's fluttering too much. I can't get a good cut." Sectonia said.

"Thunder Breathing! First Form! Thunderclap and Flash! Godspeed!" a voice called out as Zenitsu joined Sectonia's side.

"Grr…enough of this!" Gyutaro said, looking at the fallen Kagane. "I'll kill him first!" he said before his attack was deflected. "What?"

"So sorry…but…that's not a flashy way." a voice said as Uzui stood there.

"Mr. Uzui!" Tanjiro said.

"Damn it. I was for sure he was…wait, he's a shinobi. He contracted the muscles around his heart to slow it down, slowing the circulation of the poison!" Gyutaro realized.

"You two…my musical score technique…will take all of us to victory!" Uzui said.

"I'm with you." David said.

"Don't make me laugh!" Gyutaro said, unleashing multiple slashes as Uzui took the lead.

"Ichi! San! Shichi! Go! I!" Uzui called out as he deflected the slashes. "I can read it now! That filthy musical score of yours!"

"Whoa, look at him go!" Yuzuriha said.

"Musical Score? The dude turned that demon's attacks into a song!" DW typed in surprise.

"And he did it all with one arm too." Mark said rising up.

"Heh. That guy… He is a real man among men." David said with a smirk.

"Grr! I've had enough of your crap!" Gyutaro said as he charged at Uzui as the two clashed, with Uzui losing his left eye in the clash. As they fought, Tanjiro and David ran to keep up.

"He may be holding his own, but Mr. Uzui will reach his limit first. We need to make our move before that happens." Tanjiro said.

"Got it. Time to match him speed for speed." David said.

The clash continued as the demon pierced Uzui's stomach.

"Don't stop! Charge!" Uzui called out as both slayers jumped above!

Gyutaro then raised his kama to piece them both but even with that, the two swung their swords as they started to dig into the demon's neck. "What?! Even in all this pain?" Gyutaro said. "(Doesn't matter if they decapitate me. So long as my sister remains…we can't be beaten!)" he thought.

"(I did all I could…Sectonia… The rest is…up to you.)" David thought as he kept going, desperately fighting the poison.

With the other group, they continued to soar through the sky while trying to cut off Daki's head.

"Not good. We're losing steam!" Zenitsu said.

"It's too bad you'll never get the chance to decapitate me. Cause I'm gonna tear you all to shreds!" Daki said as her obi moved once more. However, they were slashed to bits as a familiar boar-headed boy had joined the fray. "What's he doing here? Didn't brother impale him through the heart?!"

"Don't underestimate the sheer flexibility of my body! Shifting the position of my internal organs is nothing but child play to me! And since I grew up on the harsh mountainside, poison doesn't work on me either!" Inosuke said, swinging his blades to join the others as the obi that was Daki's neck was tearing more and more.

"I'm so glad you are alright, Inosuke. I was kind of worried." Sectonia said.

"As if I'd let one of my underlings handle this alone!" Inosuke said.

"Brother! Help me! I'm going to get decapitated!" Daki cried out.

"(I need to unleash the Circular Rotating Slashes!)" Gyutaro thought.

They all fought their hardest. Then, at almost the exact same time, both siblings' necks had been cut through as their heads were sent flying. Rolling down past the rubble as they were soon looking at each other's severed heads in surprise and shock.

"They got 'em!" DW typed. "Thanks for comin', Upper Rank Six!"

"Alright!"

"Splendid work." Kagane said.

"Get away!" Uzui called out as Gyutaro's body unleashed the Circular Rotating Slashes, severely injuring Uzui as the slashes seemed to grow wild.

"What's happening?" Francisca asked.

"Gyutaro… He… He made them go berserk. Those slashes of his." David said. "We have to get out of here, now!"

They soon ran for it as the slashes were quickly consumed in a bright flame as all soon started to calm down as the dust settled.