Izuku woke up way later than usual, he saw on his phone that it was nearly eleven in the morning, luckily it was Saturday and Izuku needed the extra sleep, he probably exerted himself too much yesterday, and that's what he would've thought if the same slight chaos that lingered in the air reminded him of his reality, everything that happened the night before happened, his mom most likely went to work since he wasn't woken up for breakfast which also meant that she probably won't be home till 8 he got out of bed and put on a plain blue t-shirt and shorts.
He walked out to find the couch and coffee table had been moved into the kitchen "Umm… Mr. Shukaku, what are you doing?" Izuku watched as the tailed beast was writing symbols on the floor "This, my soon-to-be Jinchuriki, is preparations for the sealing jutsu that will seal me inside of you with a special seal, an Eight Trigrams seal to be precise, a pretty strong seal and gives me plenty of space." That was when Izuku noticed other symbols surrounding the tanuki, they were arranged in a circle that spanned the entirety of his living room and Shukaku was writing an inner ring of symbols, it didn't take long for him to finish the ring and he looked down at his work 'as expected of myself, I'm amazing at this.' Shukaku thought to himself "OK now I need you to be within the inner circle, and with your shirt off." Izuku was a little hesitant about the latter instruction and he fidgeted with his fingers "A-are you sure, can't we do it without taking off my shirt?" The pudgy tailed beast shook his head "Not with this sealing jutsu, I need to make direct contact with the thing I'm being sealed inside of so take it off." Izuku almost sighed and reluctantly took off his shirt and kneeled inside the inner circle.
"I-is this going to hurt Mr. Shukaku?" There was a long pause which unnerved Izuku before Shukaku placed a hand on the left side of Izuku's chest "I have no idea all I can say is if it hurts, stay still and try not to scream as I go deep down and enter your very essence." Izuku stared at Shukaku blankly "Do I need an adult?"
"I am an adult." That was all Shukaku said before he activated the jutsu, the symbols around the two flashed red before, to the tween's shock, closing in on Izuku, and the ones that reached him began to travel up his skin, shrinking and forming a circle around Shukaku's hand with a few symbols extending out towards his back, that was when the pain started, a burning, searing pain erupted from the area and Izuku gritted his teeth as tears poured down his face, it was like someone was repeatedly stabbing hundreds of hot needles into his skin times a thousand in terms of pain, he closed his eyes trying not to scream, then the pain suddenly stopped and he felt an inexplicable rush of energy coursing through his body. When he opened his eyes, Izuku couldn't see Shukaku anywhere, the tanuki nowhere to be seen, he looked down at his chest and found a tattoo of a swirl inside of the ring of symbols, both of which were slowly fading.
"(Alright kid, you are now officially my newest Jinchuriki, and soon will be the greatest that ever lived!)" Izuku yelped and shot up to his feet, was that a voice echoing in his head "(Don't panic, I'm just now the newest resident of your mental landscape.)" Well, Izuku didn't expect that, he patted the seal, and it almost completely faded away "So you live in my head huh?" To be honest with himself, Izuku thought he and Shukaku would be merged on a mental level "(No kid it doesn't work like that plus if it did, the rush of information would put you in a coma from overloading your brain.)" Oh, well now Izuku was glad that it didn't work that way, he imagined his mother, coming home to find him on the floor and wondering why her child was in a coma, and it made him shudder before realizing something "So if you're going to teach me while your sealed inside of me, how are you going to do a demonstration?" He heard a chuckle "(Like this.)"
In a sudden puff of smoke Shukaku appeared causing Izuku to almost fall backward, when the smoke cleared he made eye contact with a familiar pair of sand-colored eyes "Tada!" Shukaku exclaimed, but he wasn't the same as before, well in terms of appearance he was the same, he was the same size as Izuku, in terms of height, "Wait, I thought you said that I would die if you were removed from me?!" The tanuki only closed his eyes and shrugged his shoulders "Oh dear I should've been more specific, you will die if, and only if, all of me is removed, what you see in front of you is a portion of my chakra manifested in physical form, there's still some of my chakra inside of you, now before we start our lessons we must put everything back." He pivoted on his feet and stridden towards the furniture, as he was doing so he looked back at Izuku "Well what are you doing standing there, help me move this stuff, took me like four and a half hours to move this stuff without scraping your floor, and now that you're here you can help me." Izuku quickly moved to help the Tanuki after putting back on his shirt.
Though Shukaku didn't expect lessons to start immediately as he saw the greenette struggling to even budge his half of the couch and failing but then again he should've expected it given how scrawny the poor kid was, 'Oh my dad, he's so pathetic!' he sighed, a part of him wanted to laugh at the kid's misfortune, another questioned how the same race that could battle, seal, and control him and the other tailed beast could produce such a weakling "All right kid, stop right there" He easily snatched the couch out of the kid's hands, the greenette looking at Shukaku with a surprised look that says why "Clearly in your current state, it's gonna be a while before your even at the Uzumaki brat's level when he was your age, your way too weak physically." Shukaku held up a hand to sush the boy before he spoke "But that doesn't mean I'll ditch you for someone stronger" Though, in his younger years, he definitely would've 'god I'm getting old, mentally speaking, I'm getting patient with this kid.' "What it means is that we'll have to give you an exercise routine so that way you can increase your physical energy, course I'll have to monitor you every step of the way, so that way I know your strengths and weaknesses and build a schedule." Shukaku placed the couch and table back where they belonged "That means on Monday I'll be going to school with you if you go to school."
"Wait, you're going with me to school?" It was obvious that the kid was apprehensive about something, but Shukaku didn't need an explanation to know what and why "Look kid if you're worried about a teacher or some bully finding me, then we'll just say that I'm your quirk, I've heard that sentient quirks are the rarest types, plus it's technically true from a perspective."
The two agreed and Shukaku hid in the kid's closet in the size he was when he was in the pot, hiding in a pile of All Might merch and only coming out when the door was closed and the mother wasn't within five feet of the door or gone out of the apartment, and when he was out of the closet he was either watching television, giving the kid a lesson in the basics of chakra control, eating, or on the computer looking through internet for a place where the kid can have plenty of exercise and get lessons during breaks, though the only place he could find that's within walking distance was Dagobah Beach "Heh, someone likes Star Wars." He commented as he continued reading. The beach used to be popular with locals but trash from the ocean began to cover the beach and build up, it's more a trash heap than a beach and no one goes near the place, 'Perfect' Shukaku thought "As a great man once said, 'the best muscles are a construction workers', pretty sure clearing out trash is a close second, not like anyone's gonna let a twelve-year-old help in construction."
Shukaku looked at the blue notebook on the side of the desk next to the computer labeled "Lessons on Ninjustu, Genjustu, and Jinchuriki Techniques, By Shukaku." With a chibi version of his face drawn next to his name. he spent all Saturday filling that thing with enough info on justu that if the kid were to learn everything in it he would be on the same level as a low-level chunin based on his estimates, plus info on Tailed Beast Transformation, he laid back in the kid's chair, he was tired and needed some shut eye "So this is what your going to teach me Mr. Shukaku?" He saw the kid come up in his peripheral vision and looking through the notebook before stopping on the page "Wait, why is one of them crossed out?" The kid flipped the book to face the tailed beast his finger pointing at a single crossed out subject 'Baryon Mode'the better question was why he put it in there, it was the source of some bad memories and it hurts whenever he thought about it, so why did he put it down.
Monday morning quickly arrived and Shukaku stuffed himself into the kid's backpack shoving the notebooks and pencil case to the side "You ok in there Mr. Shukaku?" He shifted, he was slightly comfortable, as long he didn't move too much he wouldn't have to worry about a bag search, and before the two left the house Shukaku manipulated the sand in the pot as they passed and, using a technique that his previous Jinchuriki used, covered his right eye with his hand made a floating third eye to see out of with the sand.
Aldera Junior High was the kids school and from what Shukaku could see, all the kids made familiar looks at the kid, like he wasn't even worth being called human 'Well I should've expected this, but really they don't get how rare this kid is.' He looked up ahead of the kid as for some reason he was moving at a constant pace while focused dead ahead, what the kid was looking at was what a bunch of kids avoided, a spiky-haired blonde stomping his way through the crowd into the school "Man, he's got some serious resting bitch face." As the kid headed into the building towards class, Shukaku had his third eye explore the school, mostly through the ventilation system "Hey kid, is there anywhere we can go where we can be alone during lunch?" He said in a whispered voice, he felt the backpack be placed on the ground before he was slightly blinded by the brightness that is outside the bag "Well there's the back of the school near the koi pond, but we'll have to be quiet, Kachan usually eats nearby."
Of course the waiting was painful and Shukaku had spent a part of his time messing with other students with sand, especially the blonde who the kid had the unfortunate luck of being in the same class with, and the rest sleeping until after the lunch bell rung and the kid arrived at the location he talked about.
"Mr. Shukaku, Wake up Mr. Shukaku" Izuku repeatedly poked the back of the tanuki in his backpack and after a few more pokes Shukaku exposed his face to the open air, yawning as he slowly slithered, and fell, out of the bag, landing on top of his head before the rest of his body flopped in front of him "oooowww" he groaned, rubbing his head as he sat up "Are you Ok?" The tanuki nodded which relieved Izuku's worry a bit, he pulled the lunch box his mom packed him out as well as a small sheet of plastic "what's with the plastic? Didn't think a new trend would pop up." Izuku opened the box and picked out small pieces of his lunch "Not really, I don't really follow any trend outside of heroes, you need to eat as well."
"Alright kid, so you want to enter UA right." Shukaku said with a mouthful of fish, Izuku instantly nodded "Alright, but at this rate you'll be about at chunin levels of chakra control by the time you get in the entrance exams." Shukaku's words made Izuku worry, they both agreed that he'd be at least high level chunin in terms of chakra control before he learned any jutsu "but if this chakra control stuff takes me so long to finish then how can I enter UA before learning any Ninjutsu, didn't you say that those also take a long time to learn?" Shukaku nodded as he took a bite out of a radish slice "And that's correct, if you did it normally then it would take you a bit, but for now we're gonna focus on a jutsu that will increase the speed of your training by a thousand-fold, and its within my bet so it counts, I'm gonna teach you Multi-Shadow Clone Jutsu."
"Multi-Shadow Clone, How does that help me speed up my training?" Shukaku chuckled before showing a demonstration, he brought his hands together and made a cross with only his middle and index fingers, 'Shadow Clone Jutsu'. In a puff of smoke, another Shukaku suddenly appeared to the right of the original which made Izuku almost fly out of his spot regardless of the fact the person they didn't want to attract attention from was nearby, both tanukis moved in a nearly synchronized manner as the Shukaku on the left spoke, placing a hand on their chest "You see, basic clone jutsu is technically a genjutsu that can't do anything except fool your opponent but other clone jutsu, like Shadow Clone Jutsu, are tangible clones that can even use jutsu on their own, the reason why you should learn Shadow Clone Jutsu is that once the jutsu is undone, anything the clone has experienced will go straight to the user once the jutsu is undone." The clone disappeared in a puff of smoke "Of course the clone dissipates after one hit to them in battle, and the jutsu is surprisingly easy to learn, the Uzumaki brat wasn't able to use a basic clone jutsu to save his life, but he mastered Multi-Shadow Clone Jutsu in just a couple of hours and he wasn't even a genin, though that was after he was tricked into stealing a forbidden scroll containing the info on the jutsu."
"Wait, why was the jutsu hidden in a forbidden scroll?." Was what Izuku gonna learn so dangerous that information on it was locked away "Well to be more specific, the regular Shadow Clone Jutsu isn't forbidden, but Multi-Shadow Clone Jutsu is forbidden because it uses so much chakra that really only Jinchuriki or someone with insane amounts of chakra can use it, If a normal person tried to use a jutsu that they don't have enough chakra for it either won't work or they'll die." Izuku spotted some sand seeping out from the soil, molding into a tiny humanoid figure "You see, Shadow Clone Jutsu has you divide your chakra between clones, half for one, thirds for two, and so on, and when the clones are undone their chakra goes straight back to the user." The figure split into two and then three as Shukaku explained 'So if I learn Multi-Shadow Clone, then my training could speed up drastically.'
"So kid you ready, cause by the time you get into U.A you'll be able to use a couple pretty powerful Jutsu, but for now we'll teach you how to learn anything one billion percent faster, so get excited!"
