My CO Stash #29 - My Life as a Demon Slayer is Hard as Expected by sxeron10 (DemonSlayerXOregairu)

-And my Hachiman addiction strikes once again. Now this is really epic as it's a crossover between my two favorite animes: Demon Slayer and Oregairu. Sad thing is it's very short, and the updates I'm guessing are going to be once a month but still check it out~!

*Hachiman in the Demon Slayer verse, he's one of the twelve pillars and he's Kanae Kocho's husbando~!!

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Sypnosis: Hikigaya Hachiman finds himself traveling to the past but instead of normal time-travel, it seems like he travelled into an entirely new world filled with Demons and Demon Slayers. Even though he doesn't know how he arrived and who forced him to arrive, it seems likes the only way to return back home was to have a chat with Kibitsuji Muzan, the progenitor of Demons. Good luck.

Rated: T

Words: 16K

Posted on: https://www.fanfiction.net/s/13393244/1/My-Life-as-a-Demon-Slayer-is-Hard-as-Expected (sxeron10)

PS: If you're not able to copy/paste the link, you have everything in here to find it, by simply searching the author and the story title. It sucks that you can't copy links on mobile (´ー｀)

-I'll be putting the chapter ones of all the fanfics mentioned, to give you guys a sample if you wan't more please do go to the website and support the author! (And maybe even convince them to start uploading chapters in here as well!)

Chapter 1+2 (exceptional)

"Onii – sama, is there something that you would like to add?" Oy, don't say those words at me. The only one that could say that to me that is Komachi and no one else. Okay, Kanao can say it too but I can't really appreciate the way that you say 'Onii – sama' to me when your voice is tinged with spite. "Aren't you interested, Onii – sama? A demon slayer being accompanied by a demon is something that would pique your interest." Don't you dare try making me a mad scientist with your words, Shinobu! I already receive enough ridicule from the other Pillars as it is!

"Not really." And that's the truth. To be honest, I'd like to focus more on advancing myself as it is. That, and because of the many novels that I've read, I decided to make use of it and wrote (plagiarize) numerous books. Under a pen name, of course. Who knew that Zaimokusa's name would be actually useful when writing (plagiarizing) books. Of course, Kanae would scold me for not taking any sleep even though I'm the one responsible for managing the mansion's finances. When I would try to put forward a rebuttal, she would give me one those look where if I say one bad word, she would scorn me.

It's really hard to explain as to how I've fallen in love with her, but fallen in love with her I've become. That, and I have a baby on the way. It's a good thing that it hasn't hit me like a blunt hammer when I first heard of the news, otherwise I've would've run all the way to Hokkaido if I take it badly.

"Don't be like that, Onii – sama. We don't want you to become like Giyuu." Ouch. As usual, Shinobu's words packs a punch. And it wasn't even aimed at me! I heard from the Kasugaigarasu that she and Giyuu had a scuffle. Is that the reason why Giyuu is currently making a face towards Shinobu? That would make sense if that's the case. I don't know why but my hand keeps sliding towards the hilt. There's no danger coming, so I wonder why. No matter, it's Shinobu anyways so I'm sure that she can take of herself pretty well.

"Anyways, we've diverted from the topic," It was your fault from diverting it too much, you know? "Our little demon slayer is waking up." And true to her words, he was waking up.

Deep dark eyes started to blink, his gaze peering into our forms. When his eyes turned towards me, I saw it.

The Sun.

Its almost as if I was looking at a living kotatsu. The emotions that hide within the kid's pupils are too pure. This was only highlighted when the first thing that he did was to look around in distress. Almost as if he was looking for someone. Then the words came next.

"Nezuko! Zenitsu! Inosuke! Murata – san!" Are they his friends? Nezuko sounds like a girl's name and from what I remember, Zenitsu Agatsuma is a student of that old fart while Inosuke Hashibira is the sole user of the Breath of the Beast. From what I've read from the report, those three managed to hold the fort before reinforcements came in. They definitely have potential. Heck, they might even become Pillars in the near future if they continue as it is.

Oh, the kid is slightly panicking now. Better calm him down. "Kid, calm down." My words seem to have an effect as the kid took a deep breath. Good, the sooner that we can finish this, the better. The other Pillars looked at me with varying interest, with Shinobu giving the most chilling of smile that I've seen. I haven't even done anything to you so why are you giving that smile!?

Creating a fake cough, she continued, "Before we could start the trial, why don't you explain the crime you have commit – "And before she could finish, the wannabe pineapple interrupted. "There's no need for a trial! Protecting a demon is a clear violation of the code and as such, within our rights to deal with him! We're going to behead him along with the demon!" It still amazes me that he could say those words without sounding self – righteous. Also, this isn't the Shinsengumi and you suck at roleplaying as Hijikata Toshizou.

"In that case, then let me decapitate his and the demon's head flamboyantly for I shall show you the most flamboyant of bloodsprays." Uh, no. Don't sound so chuuni while talking about decapitation. It's giving the shivers. Oh wait, I'm the Ice Pillar, so I've unintentionally made a pun. Ugh. Even a century apart, Zaimokuza is still haunting me with his chuuni-ness.

"Ah, what a pitiful sight this boy is. The poor soul… I pity him for being born at all." I'm so glad that you're not an actual monk. If you were, then I would just find a new monk to hang around with.

"These are the ten highest-ranking swordsmen in the Demon Slayer Corps, so you better show respect." Actually, I prefer that you think of me as a normal person. I'd rather do one of my 108 skills than to be treated as a riajuu. "The Pillars… "Great, the kid is panicking again. If this is what being a riajuu feels like, then I really don't want to be a part of it. They can explode for all I care.

"Let put him out of his misery." For someone so emotional, he can be seriously ruthless and the other two isn't really helping with the situation.

"Forget him. What will we do with Tomioka?" If Giyuu, the only person that I can relate to in terms of social suicide, helped the kid then he definitely has a reason, otherwise, he could've just killed them on the spot. "Based on what Kocho told us, Tomioka's just as guilty of breaking the Corps rule. How shall we deal with him? How should we make him responsible? What kind of lesson should we teach him?" Okay, Iguro is taking roleplaying a little bit too far, in my humble opinion.

Pointing at Giyuu, he continues, "Don't you have anything to say, Tomioka?" Of course, Giyuu doesn't reply, he instead looks at the floor or is it the grass? I can't tell due to how perfect Giyuu's poker face is.

"What's the harm? He did come along without resisting. His punished can be decided later." Uwah… To say that with a smile is really scary! Taking a breather, she continued, "That said, I'm more interested in is hearing this boy's story. The reason he's going on missions with a demon on his back despite being a demon slayer… I'd like to hear the reason from the boy himself. You do know that it goes against the Demon Slayer Corps rules, Kamado Tanjiro – kun."

The kid stayed silent. Most likely he's thinking of words to say. I don't blame him. If the same thing were to happen to Komachi… It's a good thing that she wasn't dragged into this mess.

"Let me ask you again, why are you traveling with a Demon when you're a Demon Slayer?" Before Uzui could threaten the kid, I interjected. "Is it because the Demon is a member of your family?"

Once again, my fellow peers looked at me. Shrugging, I continued. "If that's the case, then I understand. But do remember that once a human becomes a Demon, they eat the people nearest to them, which means, they eat either their friends or family. Tell me, Kamado Tanjiro, is Nezuko the Demon then?" Receiving a weak nod, I continued "Then let me ask you a question: Has she eaten a human?"

Perhaps emboldened by my words, he answered just as fiercely, "N-no! She never has and never will hurt and eat humans!"

"I don't believe every single word that just came out of your mouth." Obviously, Iguro objects to the notion.

"Your sister is possessed by a Demon. The only salvation that we could give to the poor child is her death!" Okay, your words are just plain rude. But I don't blame him considering that everyone here has suffered from the Demons one way or another so I don't have any reason to reject his words.

"Please listen to me. Two years have passed since Nezuko became a demon and in that time period, she hasn't devoured a single human!" The desperation behind his words is plain to see but the genuineness that is mixed within is telling me that his words are true.

"Are you an idiot? The fact that she hasn't devoured one doesn't mean anything if she would eat someone in the future." That is… actually true, I have to give him that. "Don't just sprout nonsense and prove it to us with max flamboyance."

"Umm… I do have my doubts about this whole scenario. I can't imagine the Master being in the dark about this situation." Earning a hum from the pineapple and flamboyance boy, she continued, "Do you think that it's okay to deal with this without his permission?"

"Ubuyashiki definitely knows about this." Saying his name without using an honorific is both a blessing and a curse. For one, the glares that I'm receiving is definitely not safe for work but using it gives me a sense of pride that I wouldn't normally have. "Otherwise, we wouldn't be called in our semiannual meeting if that's the case. At this moment, we're just waiting for him to arrive."

"My sister will fight by my side!" Woah, that scared me. Hope that nobody saw that. "She can fight as a Demon Slayer to protect humans!"

"Well, well, well, I see that you guys are having fun without me." Oh. Here's come the abrasive fool. "So, you're the moronic Demon Slayer who's being accompanied by a Demon? What the hell are you trying to accomplish?" Oh no, it seems like Shinobu is ticked off. That's a rare sight to see. "Shinazugawa – san, please don't act out of line."

"What did you say about the demon, kid?" Of course, he just ignores Shinobu. He's definitely not going to be removed in her 'people to be pissed at' list. "That she can fight as a Demon Slayer to protect humans?" I saw his hand move to the handle. Oh god damn it, don't you dare start a scene! "You know what we call that? A total delusion, you moron!"

The moment he drew his blade, I felt my body move. I don't know if it's because of how much I relate to Tanjiro in terms of being a brother but whatever the reason is, it definitely made me move. It's a good thing that I'm standing next to Gyomei but since that, I'm still too far away to properly block the stab, then I'll need to deflect it downwards.

Ice Breathing, Third Form: Snowflake Step Dance.

Focusing on strengthening the blood flow towards my legs, I felt my feet become light as a feather. This, in turn, causes me to move almost as fast as lightning without the drawbacks of using said form. I definitely didn't steal this from the Thunder Form, no sir. Barely managing to make it in time, I successfully managed to deflect the thrust downwards, causing the ground to create a dent in the process. I saw Shinazugawa's glare bearing into my eyes and so did the rest of the Pillars with their shocked expression. It's very funny to see Giyuu's shocked face but as of the moment, it isn't important.

"Why did you stop me, Hikigaya?" Shinazugawa demanded.

Shrugging, I answered. "I stopped you from making a bad decision, idiot." Before Shinazugawa could rant at me, I heard the twins talk.

"The Master has arrived." Our attention turned towards the door and there we see Kagaya Ubuyashiki, in all of his glory.

I'm going to be receiving a huge scolding later. I only hope that Kocho wouldn't overdo it much.

Chapter 2

"So good of you to come, my beloved children." Kagaya Ubuyashiki, the leader of the Demon Slayer Corps, slowly walked towards our direction as he's being guided by his children. Looking at his face, it seems like the curse mark is slowly covering his face. That's not good. From what I remember about Ubuyashiki's words on the curse, most bearer of the curse dies before they reach the age of twenty-five, so it would explain the reason as to why he's the ninety-seventh head of the Demon Slayer Corps. But still, the fact that he's about to die makes my heart wrench.

Kaguya was the one that saved me from my despair. I'm not about to let him die if I can still do something about it.

Even if it means killing Muzan myself.

"Good morning, everyone. The weather is amazingly good today." Although his words are only greetings, his voice can make everyone at ease, judging at how the rest of the Pillars calmed down. "I wonder if the sky is blue." Damn, so the curse has managed to spread that far. "It pleases me that we've made it to our semiannual Pillar meeting with no personnel changes." Of course, there are no personnel changes, we just send you our reports about a day ago. Is he trolling right now? I wouldn't blame him if that's the case. I mean, I would do it if I'm about to die.

I heard a loud thud to my right. Discreetly looking at it, I see Sanemi forcibly holding Tanjiro's head to the ground. It would kill you to be nice to the kid, you know? Since he's still injured and all. "I am pleased to see you in good health, as well, Master. I fervently pray for your continued good fortune." One moment, he's acting like a total lunatic and the next, he's being formal and polite. I only wish that he could extend that courtesy to... well, everyone.

"And I as well, Ubuyashiki. It's good to see you still walking around." I steadfastly ignored the shivers that I'm getting right now. With how dangerous the glares I'm receiving, I instead focus my gaze at Kagaya. I'm not even working at a desk job and I'm still experiencing the negatives of having a desk job!

"Thank you, Sanemi, Hachiman." I saw a slight twitch on Kagaya's lip. Don't you dare think that I didn't see that, Kagaya! You enjoy seeing me suffer, huh?! Damn ikemen!

"If I may, Master. Before we start the Pillar meeting, would you mind enlightening us about this swordsman, Kamado Tanjiro, accompanied by a demon?" I'm also interested in learning about it. Why is Tanjiro being accompanied by a demon? There's no way that this is allowed with the only exception being he's guaranteed by someone. Is it Giyuu? The kid is also using the Breath of Water, so it's most likely him.

"Right... I apologize for startling you all. About Tanjiro and Nezuko, I've sanctioned their situation." So I was right. "And I'd also like you all to accept it." That would be hard to sell, Ubuyashiki.

"Ah... Even if it's what you desire, Master, I cannot agree to it." Gyomei speaks out. Not that I blame him, considering what he suffered towards the demons.

"I'm flamboyantly opposed, as well!" With his fingers 'flamboyantly' pointing at him, Uzui continued, "A Demon Slayer traveling with a demon is unacceptable!"

"I shall do whatever it is you wish, Master!" I know that you're the Love Pillar, Karnoji, but you need to pick your words carefully, especially since you haven't noticed the one person that has a crush on you.

"I'm fine either way." Did Tokito sleep on the way to the estate again? I'll have to reprimand him again if that's the case. Just because Yuichiro is showing signs of waking up from his coma, doesn't mean that he has to take care of his twin every single day. We have doctors and nurses trained for that reason!

"I won't trust them. I won't trust them." You don't have to repeat your words twice to prove a point, you know? "I loathe Demons in the first place, so why should bother giving this demon mercy?" Calm down with the roleplay, Iguro.

"Although I respect you with all my heart, that's an incomprehensible notion, Master! I oppose it with everything I've got!" Do you have a fetish for contradicting yourself, Kyojuro?

"The Demon Slayer Corps' mission is to eradicate demons. I request that you penalize both Kamado and Tomioka!" I almost thought that he wished for their deaths. Good thing that he didn't.

"Kamado Tanjiro is being guaranteed by Urokodaki and Tomioka, isn't he?" I blurted out. It makes the most sense; Nezuko not eating a single human for two years, Urokodaki taking care of the siblings. That old bastard is crafty. I saw Kagaya's smile become more pronounced.

"The letter." I saw Hinaki unfolding a letter. "This is a letter received from a former Pillar, Urokodaki Sakonji. I shall read you an abridged version." Well now, this should be fun.

"Please allow Tanjiro to be accompanied by his sister, a demon. Because of her resilient mental strength, Nezuko has not lost her human emotions. Even in a starved state, she never devoured humans, and this had held for more than two years. Although the situation seems somewhat far-fetched, it is an indisputable fact. If Nezuko does assault a human, Kamado Tanjiro, as well as Urokodaki Sakonji and Giyuu Tomioka will atone by committing seppuku."

Wow... I have nothing to say to that except that these three believes in Nezuko. And as an older brother, my respect for Kamado Tanjiro grows.

"So, what if they commit seppuku? If you want to die, then rot in the dirt for all I care!" Oy, those words are way too out of line. "It's no guarantee! Not by a long shot!"

"Shinazugawa is right! It won't bring back the people who were killed!" As much as I want to disagree, Kyojuro is right. It wouldn't bring back the people who were killed by the demons but it doesn't mean that we should be blinded by our hatred towards the Demons. I can see it clearly, a change is happening and it would revolve around the Kamado siblings.

And I'm not about to let it go.

"If that's the case, then I shall also guarantee Kamado Tanjiro's words and if Nezuko does devour a demon, then I, Hikigaya Hachiman, shall also commit seppuku." I solemnly stated as the rest of the Pillars had a look of shock on their faces, even Kagaya was surprised but it was quickly removed.

I felt myself being lifted and lo and behold, I saw Shinazugawa's face baring at me. "What did you say, Hikigaya!? You're willing to commit seppuku because of that demon-loving brat?!" Shinazugawa roared as he shook me hard. I can feel my haori being torn up. Stop that. This haori is custom made and I don't want you to ruin it because you wanted to make a point!

"Nii-san, are you serious?" Although aloof, I could hear Tokito's concern when he spoke. Don't make me back down on my words, Tokito! I have a good explanation for this, so you need to wait.

"Onii-sama, I hope that you're joking. You better have an explanation that I can bring back to Onee-sama." Can you please remove your hand at the handle, Shinobu? I might think that you wanted to kill me first before I can even commit seppuku!

Sighing, I pointed to my eye. "That's easy to explain. His eyes." Earning a look of confusion from Shinobu and a chuckle from Kagaya, I continued, "The eyes are the window of the soul and looking at Kamado, I can confidently say that Kamado can make sure that Nezuko would never and will never eat a human." As I looked at the kid, I can see tears dripping through Tanjiro's eyes. Don't cry, man. You're making me feel embarrassed at my words. And now I feel like a shounen protagonist. Great, as if the day could not get any worse. Oh yeah, I still need to contain Shinobu's glare.

I know what to do. Looking at Shinobu, I gave her a smirk, "Besides, Kanae would understand." I hate using that card but if it means that I can get Shinobu to agree, then I would use it. Seeing her eyes widen and huffing cutely is solidifying into my mind that Shinobu is a Tsundere. No matter how much she tries to copy Kanae, Shinobu could never really hide her Tsun side.

Ubuyashiki chuckled, either from our antics or from the situation that is currently unfolding, causing the rest to turn their gazes back to Ubuyashiki, "You do have a point. We can't guarantee that she won't attack humans and we can't prove it. That said..." Here, although it was carefully hidden, his voice lowered. "We also can't prove that she will attack humans."

Sanemi gasped but Ubuyashiki continued, "The fact is that Nezuko has refrained from devouring humans for more than two years and also that four people are risking their lives for her. To reject this notion, those who reject it must offer an even more convincing argument." And there it is; Mr. Ubuyashiki's cold, hard facts. Man, if this guy were to be born in the twenty-first century then he would be a politician or a lawyer.

I looked to the left and I could see Kyojuro's smile leaving his face. Although he doesn't show, Kyojuro was the type of guy that knows how to hide his feelings. Just like Hayato, he would always grin; no matter the circumstances. Since we first met I used to hate his guts because he reminded me of Hayato but ever since we had that conversation...

"Also, there's something that I'd like to relay to you, my children. Tanjiro here has met Kibitsuji."

I felt my hands gripping the ground fiercely. Finally. The Demon has made a mistake.

"What?! The kid has met Kibitsuji?! The only Hashira that has met with Kibitsuji is Hikigaya and even then we still lack information!" That was a once-in-a-lifetime chance, Uzui and I wasn't even a member of the Demon Slayer Corps back then! So don't say it as if I have a group of shinobi just lying around gathering information!

"Did you battle him?" He didn't. Otherwise, he wouldn't be here if that's the case, Tokito.

"What was Kibitsuji doing?! Did you find his stronghold? Answer me!" Please stop that, Sanemi. Kamoda can't answer you if keep spinning his head around like a washing machine. "Shut up! I asked him first!" God damn it, Uzui. I swear, they act more like children than proper adults.

Their bickering was stopped when Ubuyashiki silenced them. And he didn't even to speak. I wish I could that back then, mainly because I want Zaimokusa to stop speaking every time we meet. "Kibitsuji has sent pursuers after Tanjiro. Though his purpose may simply be to silence him, now that Kibitsuji's given himself away again, I don't want to let it go a second time." The Demon has slipped and we now have a trace. "I also believe that something's happening to Nezuko that Kibitsuji never saw coming." There's that too.

"Can you try to understand?" That's asking too much, Ubuyashiki. While everyone just stares at him, Sanemi doesn't and instead replies, "No, I can't understand, Master."

Shaking in anger, he continues. "If it were human, then I'd be okay with letting it live but not a demon! Not after all that we, the Demon Slayers, have gone through in battle! Not after so many people have lost their lives! It's unacceptable!" Damn it. Just when things were about to cool down. Sanemi is going to do something stupid, I can tell.

Lowering myself so that I can whisper to Kamado, I quietly spoke, "Kamado-san, I request that you remain calm. Sanemi is going to do something drastic and I don't want you to make a scene. Is that okay?" Seeing him nod, I nodded as well before gesturing to Sanemi, who's currently taking out a sword and proceeding to slice up his wrist. Of course, he's going to do that. With Sanemi's blood being a Marechi, Nezuko would have a hard time resisting the most intoxicating blood to a demon. I still don't know what type of blood a Marechi is included in but I hope that they can finish what type of blood it is before the year's end.

"Master, I will prove it to you myself! The sheer ugliness of a demon!" After that, Sanemi proceeded to take the box and roughly slamming it down to the ground. I can hear Tanjiro gritting his teeth but he still hasn't made any attempts to break out of his ropes. That's a good sign, Kamado. Control your emotions if you want to prove that your sister is someone different.

"Hey, demon. It's time to eat! Sink your teeth in this!" Sanemi states as he let the blood drip into the box. I keep my grip on Tanjiro's shoulders as he tries to move. "There's no need to force yourself to hold back. Just show us your true colors and I'll decapitate your head right here, right now! You demon!"

"Shinazugawa, it's no good doing it in the sunlight." And why do you have to complicate matters, Iguro!? "We have to go into the shadows or the demon won't show its face."

"Master, please forgive this discourtesy." After saying those words, Sanemi proceeded to jump into the mansion and throwing the box into the ground. Before Tanjiro can shout and attempt to break free out of his restraints, I strengthed my hold on his shoulder. Shooting me a desperate look, I only shook my head, indicating that no, you should not try and attempt to break free, even if Sanemi is stabbing the box and pouring his blood into the holes. I turned my head to Iguro, who's about to jump and stop Tanjiro. I just looked at him, proceeding to give me the stink eye. He relented and instead, focused his gaze towards the event that is happening.

"Come on out, demon! It's the human blood you love so much!" Seeing no reaction, Sanemi opened the box and slowly, a girl rose up. Although I couldn't see much of her physical characteristics, the fact that her mouth is dripping with saliva is an indication of her being a Demon.

"Nezuko!" Tanjiro shouted as she glared at Sanemi.

God, I hope that I made the right choice. I don't want to commit seppuku, I still have the kids and my wife and child to worry about! So please, grin and bear with it, Nezuko!