Phenomenon Breathing (Mitsuri Kanroji x Male Reader) - [Chapter Thirty-Eight]: Y/N And Obanai Team Up! - Page 9 (2024)

 
Wattaoto let out a roar as the black blood that spilled onto the ground transformed into more black snakes; Iguro and Y/N, who grabbed Wattaoto's sword in the process, leapt back a bit and both moved their blades at rapid speeds to behead all of the snakes as fast as they could. Y/N was somewhat keeping up now, or at least better than before.
"L/N, I'm going to need you to help me," Iguro said once all the snakes had been cleared.
Y/N, spitting out blood onto the ground, replied, "If that's what it takes to behead this Demon... I'll do it." He couldn't last much longer in this battle, so he'd have to resort to this, whether he wanted to or not.
"It's a plan simple enough for you to understand... We overwhelm him with speed to the point where he's forced to focus on only one of us, allowing the other to behead him quickly," he explained swiftly. "Even if he uses his black snakes, continue to run forward."
Nodding, Y/N swung both blades at the air for a second, as if properly examining how it felt to dual wield swords, and then charged forward with Iguro. Y/N was on the left while Obanai was on the right, and when another swarm of black snakes were sent at them, neither of them faltered for even a second.
Following Obanai's instructions, Y/N muttered, "Phenomenon Breathing... Seven Plus Nine." He charged through like a wild beast, slashing everything in his way. With each slash, his speed increased, until he was slicing away at all of the snakes so quickly that even Wattaoto struggled to keep up with his movements. On the other side, Obanai was doing just as well, if not greater, his movements so agile and fluid that it didn't even look like he was moving to slice the snakes. In fact, he didn't even stop for a split second.
Then the snakes going for Y/N suddenly stopped, as the snakes going for Obanai seemed to increase exponentially. Gritting his teeth, Wattaoto sprung in front of Y/N with his fist reeled back, but when he unleashed the punch onto the Demon Slayer, he smoothly flipped over it, chopping the Demon's hand off in the process, and went straight for the neck. The Demon let out a growl as he spun around and kneed Y/N, who coughed out blood. But he dug his swords into Wattaoto's chest and forced it down the Demon's body, and at the same time, Wattaoto forcibly grabbed Y/N's head, as if he was going to completely break it.
Then Obanai swooped in, chopping off Wattaoto's arms, the tight grip around Y/N's head weakening greatly, and Y/N followed his attack up by forcibly moving his swords in a way that separated the Demon's upper body from the lower body. Wattaoto swiftly made more snakes from the blood that fell, as his separated halves fell to the ground, but Obanai simply cut through them at a greater speed.
Y/N picked Wattaoto up by the hair, dropping the Demon's blade to the ground to do so, and forced his blade through the Demon's neck, ripping through his flesh at a steady pace. One third was gone in an instant, and it quickly transitioned to halfway, but before he could finish the job, Wattaoto headbutted him, knocking him away just far enough for Y/N to let go of his sword.
See Also
Full list of the Twelve Demon Moons in Demon SlayerAnime Card Battle: How to Beat Muzan Boss - Item Level GamingMuzan's Final Form Explains Why Demon Slayer's Demons Vary from Human-Like to Grotesque - OtakuKartCreator Profile of 🤨💅Gazpacho 💅🤨 - Create Your Own Talking AI Characters | Talkie AI
But then, before Wattaoto could recover from this, Iguro zoomed forward and grabbed Y/N's sword, digging it through Wattaoto's neck, all while tossing Y/N Obanai's special sword in the process.
Y/N shouted, "Phenomenon Breathing: Four Plus Nine!"
With a loud boom, Y/N bolted back towards Wattaoto and impaled Obanai's Nichirin Sword through his head, forcing it so far that the end of the sword could be seen on the other side and the handle was right up to his head. Wattaoto roared, but before he could do anything else, Y/N kneed his head.
"His knee... is like steel!" Wattaoto coughed, but his eyes widened in realisation. Because nobody had a knee similar to his, outside of his family. "Y/N...?!"
"Sorry, Father," Y/N muttered, but his body failed him right after, as his aura dissipated and he fell to the ground, unconscious. But Obanai swiftly finished the job at the same time, beheading him.
"Y/N..." muttered F/N as his real memories came pouring back into his mind, during his last moments. His head slowly disintegrated, but his body crawled to the man and placed its hand onto his. "I'm... sorry..."
He fully disintegrated into nothingness.
...
The ending begins with Y/N extending a hand out at the sky.
The camera zooms out, revealing him to be stood on a large hill. His home is nearby.
See Also
Multiple Settings - {IC} ꜱᴏᴍᴇ ᴋɪɴᴅᴀ' ꜱᴇզᴜɪᴛᴇʀ - Your charries' lost IC... (Yes, Always OPEN!!)
It transitions to a black void, where a young Walker is standing on the left side of the screen, looking to the left, and the current Walker is looking to the right on the right side of the screen. 
It transitions to a young Zion sitting in a puddle of water on the right side of the screen, as the current Zion sits in a river of blood on the right side of the screen.
It transitions to a young Wyatt with his arm extended upwards, standing on the left side of the screen in a spotlight, and Beyond standing with his palm facing upwards, a ball of fire burning in his hand, standing in the shadows but noticeable.
It transitions to a slightly younger Kanroji looking down slightly as a man with glasses walks away from the bridge they were on. Y/N steps into frame but the camera is at an angle that prevents his face from being seen. 
It transitions to a slightly younger Y/N's hands clutching grass as the remains of a Demonised Carbon disintegrate, before Kanroji steps into frame, but her face can't be seen either.
It transitions to F/N just sitting on his own in the shadows, tears falling from his eyes. Nobody steps into frame. 
It transitions to Overlord sheathing his sword, back-to-back with his younger, human self, who has a sweet smile on his face as he holds a crate of milk. Upper One steps into frame.
It transitions to a human Carbon holding a crate of milk, back-to-back with his Demon self, whose arms are stretched wide and far to the sides. Obanai Iguro steps into frame. 
It transitions to a young Obanai Iguro sat in a wooden cage with his hands on his eyes. Rengoku steps into frame.
It transitions to Y/N back on the hill, watching the sunrise.
...
End of Chapter...
So Y/N had to face against his demonised father (because Muzan sure does love turning his family into Demons :D), but with the help of Obanai, as well as his sheer f*cking will he was able to defeat him. Nothing to say, other than this totally didn't take me weeks to finish (with a rushed end sequence, too) because I lost motivation, which provoked me into starting a whole new book just to stall and ensure weekly chapters until I finished this. That'd be ridiculous.
This arc, albeit rather short, was hopefully entertaining. Guess what the next arc is going to be? Red Light District Arc: it's finally time. What'll we be getting in this arc?
— Zion's backstory
— Tanjirou will fight a certain Demon...
— A moment which will make someone (and maybe more people) hate me
That's all I will share, because no spoilers. Crazy arc is coming, look forward to it.
I hope you enjoyed the chapter. Please have an amazing day!
Obanai stared at what he had placed next to Carbon's and M/N's graves; a new gravestone with amber flowers around it for F/N. It wasn't the only grave with new flowers placed; he'd gone through the effort of picking some to put in front of M/N's, too. He had to pay respects, despite them producing a son that was rather... interesting, let's say.
Then he turned to Carbon's grave, approached it slowly, and placed down a few more flowers he had picked up.
"Sorry."