Alright I've been watching "Welcome To Demon School Iruma-kun" and it got me thinking of this possible idea for a crossover story, hopefully someone will be interested in adopting it.

A Hanyou Goes To School!?

Chapter 1

Pilot

Hi no Kuni

Year 1 In Training Trip

It's been well into the first year after Naruto has left on his training trip with Jiraiya, right now they were at a hotspring where the Ero-sennin was trying to teach Naruto how to use the fox's chakra, but unfortunately due to the man not having any experience in actually working with a container before, minus Kushina, but she's never had a use for it's chakra so he doesn't have a clue.

So right now, he is dealing with an out of control 14 year old Naruto, that's about to gain his fourth tail of the fox's chakra, with Naruto about to charge at Naruto until, "Well that wouldn't help matters at all, you know you shouldn't be messing with a seal made by a death god!" A happy and cheerful voice exclaims.

Everything suddenly froze for Jiraiya turning grey apart from himself, looking around noticing the unmoving kyuubi-mode Naruto on leaping towards Jiraiya, but the teen was frozen in mid-air, making the pervert even more confused, "Who said that, show yourself!" He calls out to the voice, getting ready to fight whoever interrupted the training.

Suddenly a very tall and imposing figure appeared. He is bald, save for two large yellow horns on the side of his head. He has pointed ears, a large nose, and a white handlebar moustache. A pair of glasses sits at the top of his nose, and are obscuring his eyes, despite being tiny. His fingernails are long and are painted a dark purple.

He wears a dark purple suit with long coattails and a white-furred collar with what appears to be the skull of a large bird in place of a tie, the being began to talk to the sennin, "Greetings Jiraiya-san, my name is Lord Sullivan, as you can see, I'm a demon and I'm here to help you out, but for a price." He finishes in a demonic tone.

Jiraiya was surprised at such an introduction, it is pretty obvious that this being was a demon, a very powerful one if he was sensing things right, but why would this demon want to help, "Tell me Sullivan-sama, what is it you want to help me with, why is a demon as powerful as you here in the first place and what is this price you speak of." Jiraiya couldn't really help being curious, he is a spymaster, wanting to gather information is apart of his job.

Sullivan knew he had to be quick, but also he had to be detailed since he doesn't want anyone knowing what he was up to, "I'll be honest with you Jiraiya, what you did was down right foolish, I mean, tampering with a seal made by a death god, you were lucky that I arrived instead of him, but since he owed me a favour, I came here instead, so I'll tell you." At first he was pretty much telling Jiraiya off like a child messing with something he shouldn't, but at the end he became deadly serious.

Straightening his cuffs, Sullivan began, "After my talk with the Shinigami, I came here wanting to adopt young Naruto-kun as another grandson, since I realised this opportunity would be perfect for the both of us, and of your village." Jiraiya was now in shock, this demon wanted to adopt Naruto as his grandson, it was completely ridiculous for the toad-sage to hear such a thing.

With a smile, Sullivan continued, "You see I've already adopted someone else to be my grandson as well, but I figured that he would need a brother to help him out in things I can't, but also this way, I can train and teach Naruto how to use the fox's demonic chakra without being controlled by it, making it his own."

While Jiraiya was surprised at the demon's admittance at not only adopting another human as his grandson, Jiraiya couldn't help but feel sceptical, "I can understand wanting to give you grandson a brother, but why do you want to help Naruto."

Sullivan just looks towards the frozen and transformed Naruto with a sad smile, "Say what you want about us demons Jiraiya-san, but we always try to be there for the children, whether they're demons or humans it doesn't matter, I can see both Naruto-kun and Iruma-kun being the bridge between our worlds, allowing us to have a more peaceful coexistence together."

Though Jiraiya knows that there might be something else up the demon's sleeves, he can't really deny that a more peaceful coexistence does sound good, though with demons might be pushing it, with the demon lord seeing Jiraiya's hesitance Sullivan replied, "How about this, I'll let Naruto return to you when he's ready to face the Akatsukis, since he'll be properly trained in his demon powers, also he'll be hidden that not even that rogue gallery will be able to find him, and I swear I won't try to corrupt him into wanting to stay in the nether-realm, that will be his choice."

Thinking things through, Jiraiya knows from hearsay that a demon's promise is law, that it always keeps it, also he knows that Naruto will return since the teen still wants to keep his promise to get Sasuke back to the village as well, seeing no fault, Jiraiya concluded, "Alright, you can adopt him as his grandfather, but he gets to return when he's strong enough to face the Akatsuki, also I want progress reports on his training and how he's doing."

Sullivan smiles, agreeing with the term, "Very well, oh, and make sure to tell your Hokage that I'll be helping him, since he needs all the training and family that the village couldn't give." With that time returned to normal, with Naruto and Sullivan no longer being there.

Jiraiya releases a sigh, "I guess I'm gonna have to tell Tsunade-hime about this, no doubt I'll have a near-death experience again for letting such a thing happen, but if it makes Naruto stronger, along with someone having a proper idea on how to control demonic energy without losing control, then it's regrettably perfect for Naruto's training and it'll keep him safe." Thinking about how Tsunade will react to such a thing, Jiraiya quickly added, "Though maybe I'll send a scroll via toads about what happened."

Since he wanted her to try and calm down until he gives a detailed description of what happened, without being in a full body cast.

Nether Realm

Just as Sullivan entered the Nether Realm, he suddenly noticed something wrong with Naruto, quickly stopping, he gave a quick scan, "Hmm, it seems I should've suppressed the fox's energy before we entered this realm, I guess I really am getting forgetful in my old age."

As it turns out, due to Naruto still being in the four-tailed Kyuubi-mode, along with entering the nether realm, he was transforming into a hanyou, very painfully as well, his hair still stayed spiky, but now it was red, his hands became claws, along with grunting in pain when his upper and lower canines growing into fangs, his eyes still kept their deep blue, but now his pupils became slitted, his body became leaner like a swimmers body.

But what really stood out was the fox ears and tail that popped up from his head and tailbone, showing that Naruto was now a half fox demon, since his body also absorbed the natural energy of the nether realm.

Due to these changes, Naruto was knocked out, though it did give Sullivan a chance to cast a quick language spell on Naruto so he'd understand him, "Since the spell I used on myself is only temporary and mostly forgotten, this way young Naruto will be able to understand those around him, unfortunately I didn't foresee him becoming a half-demon, but at least this way he can hide what he is, though as precaution I think he'll still need to be bathed in the demon-fragrance."

With that said, Naruto was now laying in a luxurious bed, his eyes slowly began to open up, his vision was blurry but it was slowly coming back into focus, "W-What, where am I!?" The only thing he could remember was training with Jiraiya into trying to control the fox's energy, but after that everything became a blank for him.

That is until a happy voice yells out, "Hello Naruto-kun, did you have a good sleep, I know it's a bit sudden having a demon to ask you to be one of his adopted grandson, but both Levy-chan and Bel-kun just wouldn't stop bragging about their grandchildren, so I wanted to have two!"

Hearing and seeing the man- demon(!?) in front of him say such things was mind blowing for Naruto, since he had no idea what was going on, though he did manage to catch that the old man wanted to adopt him as his grandson, but what about Hiruzen, "Um, wait a minute gramps," The old man seemed to like the nickname that Naruto gave him, "But what's going on!?"

Quickly clearing his throat, Sullivan began explaining to Naruto what happened, from Jiraiya's blunder with the seal, all the way to Naruto becoming a hanyou, though Naruto was slightly in pain at the thought of being a demon, from what he can tell with Sullivan, not all demons are evil, though there was one thing that made him hesitant, "So, you'll help me in controlling the fox's power, while I gain a brother and grandpa as well, but I'd be able to return when I get strong enough to fulfil my promise to Sakura-chan, right?"

Sullivan became happy, "Of course Naruto-kun, you can return to Konoha whenever you want, though I would suggest after you completed your training, that way you'll be strong enough to face Akatsuki, plus staying here will keep you safe from harm," Sullivan then poured a large liquid onto Naruto, "Also with this fragrance you won't have to worry about demons trying to eat you ^^!"

This threw Naruto for a loop, though at the moment he was on the floor with tears in his eyes and holding his nose, complaining about the stench, Sullivan seeing this realised something, "Oh my, it would seem your senses are far more stronger than before, more than likely from your transformation, but I'm sure in time you'll get use to the sent."

Naruto gave the man a look that says, 'You must be old!' But Sullivan just ignored it and allowed Naruto to sign the adoption papers, "Now that that's settled, lets go and introduce you to your new brother, Iruma-kun!" He says out loud in excitement, "Oh, by the way, this room will be yours and I expect you to join your brother in going to school tomorrow."

At this Naruto groaned out, "But gramps~!" Hearing such a moan made Sullivan smile, but he just wagged a finger at the boy, "Now Naruto-kun, it's for your own good, you didn't pay attention during your academy days, also I can understand since that school can hardly be called a "ninja" academy, they barely gave you the right amount of training for the real world, and when it comes to studying you don't pay attention, after all, you need to balance both mind and body, so from now on, you'll be eating a proper meal, with Ramen only being eaten once a week."

Hearing such a thing, Naruto was about to complain, that is until Sullivan began to ball his eyes out and exclaiming how his grandson wouldn't listen, causing Naruto to groan and agree with a huff, though Sullivan quickly took a picture at Naruto's pouty face, causing Naruto to see spots until he rubbed them away, "Aw~! You're just so cute when you pout like that Naruto-kun~ I can't wait to show Levy-chan and Bel-kun this and future pictures of you and your brother~!"

Hearing this Naruto began begging his new grandpa not to show anyone such embarrassing things, but, as everyone knows, Grandparents just love to brag about their grandchildren, along with embarrassing them, how will Naruto survive a demon school, will he be able to protect his new adopted bother, no-one really knows.

The End.

There you have it, my take on Naruto becoming a hanyou and ending up being Sullivan's second adopted grandson, I can also picture Naruto being there for Iruma to help him get by.

Also as a familiar, I think it should be Kurama in a chibi-form, where how much energy Naruto allows the fox to have will depend on his size and power, since they're connected and everything, also because I made Naruto a hanyou he doesn't have to worry about gaining Kalego as a familiar.

Though during the badge quest, I can see Iruma still getting the ring, but for Naruto I can see him getting the Alastor sword, where the handle and guard are poking out of the owl's bag, then shoots up into the air and stabs Naruto through the heart, causing the class to watch in horror that something like that would happen, with Sullivan appearing and becoming enraged that his second grandson was impaled and about to yell at Kalego for allowing such a thing to happen, but suddenly they felt a pulse of energy coming from Naruto, just like the game canon, where Naruto then grabs the handle and began swinging it around like in a trance, doing the same tricks as Dante, then places the blade on his back, where blue lightening dance on it for a second.

I also picked the Alastor Sword because it's hardly been used in a Naruto fanfic, devil or otherwise, since it's an amazing sword.

As for the pairing(s) I was thinking Naruto/Ameri, but it's up to whoever adopts who they want Naruto to be paired with.

I Do Not Own Naruto Or Mairimashita! Iruma-kun.