Henlo Nuggies and welcome to a fanfic I shouldn't start because I have many others to update and such, but here we are anyway! As per my usual genre of fanfictions this one will have SLASH! There's your warning and if you don't like it then go away! We, open minded, lovely people don't need or want your negativity around.

Disclaimer: I do not own anything pertaining to the Boku No Hero Academia/My Hero Academy franchise. It belongs to its rightful owner(s), in which I am not one of them! I do not, nor plan to, make any money by writing this. This is for pure entertainment only!

Pairing: BKDK/SHIM/BKDKSH

Rating: M

Chapter Warnings: None

A/N: Italics is going to be used for communication other than speaking. Ex. Writing, texting, sign, etc.

Discord will be posted on A03 (Archive of Our Own) for those who are interested in joining it! Merely copy and paste the full discord link to a web browser to get sent to it!

Enjoy!

Izuku smiled as he looked at his Kacchan, who was studying his face. They had gone upstairs while the adults talked downstairs and Izuku immediately crawled into Kacchans' bed where his scent was the strongest. His feathers were replaced with snow leopard cub ears and a tail grew at the base of his spine. He let out a soft sound as Kacchan joined him on the bed, although his Kacchan was sitting instead of laying down.

"K-Kacchan," Izuku said softly and gave the other teen a grin when he looked over.

"Where have you been all this time?" Katsuki asked as he leaned back against his headboard as Izuku moved to lay against Katsukis' leg and placed his head on the muscular thigh.

"T-Taken b-by Villains," Izuku replied as nuzzled the muscled thigh by his head, "Th-They killed Momma. Took m-me."

"They were all captured, right?" Katsuki asked, his voice hard, and when Izuku looked up he could see fury in those red eyes. When Izuku shook his head no he saw Katsukis' eyes darken into something he couldn't tell what it was. His shadow writhed in fury, but held a protective quality.

"We'll keep you safe," Katsuki said as he reached down and dug a hand into Izukus' curls to gently scratch at his scalp. The sensation made Izuku purr loudly and he couldn't help but melt into the touch. "I swear it on everything," Katsuki whispered, "I just got you back. You're not leaving my side again."

But Izuku did have to leave his side it seemed.

To go to UA that was. Two hours passed since Izuku and his adults got to the Bakugo household, but already they had to leave since Aizawa had a gym room booked at UA for Izuku to use his Quirks in a controlled environment before UA began. Izuku was reluctant to leave his Kacchans' side and even let out a few grumpy growls at Aizawa when the man had picked him up from the bed.

In the end his Kacchan got to go with them to UA.

Izuku sat in the back of the car, purrs bursting loudly out of him, and his hand in Kacchans' hand. It was warm, rough, and gave him a comfort that he didn't know he needed. He listened in on the conversation Hizashi had started with his Kacchan and found out what his Kacchan had been doing all these years. Community service, volunteer work, therapy sessions like he was doing, and training so that he could get into UA to become a Hero. His Kacchan even admitted that he wanted to become a Hero in the first place to find Izuku. Katsuki had always believed that Izuku was out there, hurt and lonely, and wanting to come home.

"By the time I was in middle school, I'll admit I had become a bit a bully. Pushing others around and threatening them. Mom and Dad were getting worried and did their best with me, but I guess enough was enough. They ended up having to take me to a Quirk specialist and come to find out that my Quirk messed with my body more than was expected," Katsuki replied, "My quirk makes it so I'm pumped up with more adrenaline than I need so I can produce sweat. It was causing all these problems, the anger, the aggression, and other hormonal imbalances and so with medication and therapy I was able to finally calm down enough to function as a normal human being."

"That must have been tough to get figured out," Hizashi said as they pulled into the underground parking lot the teachers had access to at UA. There were a few cars parked in there and they ended up parking next to a large pickup truck.

"Kind of," Katsuki replied as they got out of the car, "it was All Might that suggested getting the tests done. He visited me in the hospital after saving me from a villain. I was a bit heated and was constantly yelling, and when he found out what my quirk was and what my sweat was made out of he suggested it to my parents to get it checked out. It happened in the hospital. After all that and getting what I needed, All Might approached my parents to ask to train me for UA. Been doing that for the last year until he had to leave to do what he needed to."

"So All Might just dropped you after a year?" Hizashi asked as Aizawa led the way out of the parking garage and into the main building of the school.

"Yeah, until he showed up three weeks ago asking if I would take his recommendation into UA," his Kacchan said, "I wouldn't have minded going through the regular entrance exam, but after that shit, him leaving after a year and all, the old man owed me."

Izuku let out a grumble at the thought of the Hero; the one he looked up to abandoning his Kacchan, but at least with All Might returning to Kacchan and recommending him let Izuku meet his Kacchan earlier than he would have. He let the rest of their conversation slide over him as it went on to other topics and looked around as they walked down the hall. He recognized the hall from the other day where Aizawa had carried him from the observation room and he couldn't help but send a kitten-ish glare to the conference room his adult took him into as they passed. Soon enough Aizawa led them into a gym, it was large, but empty. A completely blank slate besides the stands on one side of the room and the wall of mirrors on the opposite side of them.

"Zashi, Bakugo, could you both go sit on the stands during this?" Aizawa asked as he stopped a couple of yards into the room near the center. The two, after Hizashi whispered something into his Kacchans' ear, left to go sit on the stands as Izuku stood there near Aizawa.

"Okay Izuku," Aizawa said, turning towards the smaller teen, "I want you to run through Animal Cloak first. I want to see the biggest and the smallest form you can change into. I know you can use claws and such when you're partially transformed, but can you fly without changing?"

Izuku nodded and hurried a few yards away so he wouldn't accidentally crush Aizawa under his foot. It took a quick few seconds for the form of a large white skinned, green eyed, elephant to stand where Izuku stood. Izuku flapped his large ears and shook his head as he got used to the larger form. His tusks dipped low and were long and pointed at the end while his trunk just barely brushed the ground. Before changing back Izuku couldn't help but lift his trunk and let out a bellowing trumpeting noise. His smallest form was of a jumping spider. Small, white furred, and had to jump into Aizawas' hand just to be seen by the man.

After that he went through the different forms he preferred and went through the partial transformations for Aizawa. He flew on large white eagle wings, and jumped around on Kangaroo strengthened legs. He had started to feel a bit winded by the time he was finished demonstrating Animal Cloak, but Regeneration had kicked in and healed all of the exhaustion and soreness he was feeling. Aizawa had made him take a break regardless, saying that even though he could continue the demonstration, rest was important, before getting back into it.

This time was with the Quirk he disliked the most.

"I know some of what Shadow Puppet can do from what you have already told me and the detective from the hospital," Aizawa said, "The traveling, the possession, and the shadows telling you things about the person, but I want to see it in action. Start with the traveling then I give you permission to use possession on me."

Izuku swallowed around the lump in his throat as he sent a look towards Hizashi and his Kacchan on the stands before giving Aizawa a nod. He zoned in on Aizawas' shadow and in a split second he was next to the man before ducking back into the shadow. Possession has always been weird, morally wise and feeling wise. While in a person's shadow he was able to fully 'see' who that person was. He had to take everything the person he was possessing was before he was able to overtake them. He did this slowly so Aizawa could fully feel what he was doing, but Izuku had been trained thoroughly and could possess someone in seconds. His trainers had described the feeling as if there was a bunch of invisible insects crawling over their skin while suffering through an intense session of chills.

Once Izuku had fully taken over he made Aizawa walk to the wall of mirrors to see that his eyes had changed from the dark irises he was born with to his own bright green ones. That was the only change Izuku couldn't fix during possessions. He was able to keep his white hair from overtaking who he was possessing, but the green eyes always stayed no matter how many punishments he was given. He turned Aizawas' body away from the mirror and walked back to the middle of the gym where he quickly let go of possession and appeared beside his adult once more after leaving his shadow.

Izuku saw Aizawa take a deep breath and fight to shake as if he were going to shake the feeling away. He listened as Aizawa told him to focus on Hizashis' shadow and tell him something that Izuku didn't already know about the man. Izuku did his best to isolate Hizashis' shadow, finding which shadow was his was easy thanks to how 'bright' it was and the familiarity. Izuku took a deep breath and let the whispers rise to a normal talking level. Izuku ignored all of the sexual aspects of what the shadow was telling him, he didn't want to know how his adults mate, there was a few terms that came up that he did take note of to look up later.

"Z-Zashi st-still h-has feelings for s-s-someone n-named Oboro," Izuku whispered out in his usual stutter, "W-Who is Oboro?" Izuku saw Aizawas' jaw clench and a pain fluttered through his shadow before the man told him that Oboro was an old friend of theirs that had passed. Izuku nodded as his brows furrowed in confusion as Aizawas' shadow told him something different than what Aizawa told him, but he wouldn't bring it up again as it seemed that just mentioning the person hurt his adult.

"Can Shadow Puppet do anything else?"

Izuku nodded and demonstrated what he could do with the shadows. He could made people, animals, random objects and the like, but there was no color to them besides the shades of black. He created tentacles of shadows showing Aizawa that he could grab things with it when he wrapped them around the man. He just wasn't able to use them as a grappling hook, much to his disappointment. No matter. If he needed to get anywhere he could just change into a bird or teleport to where he needed.

"T-There is o-o-one other thing," Izuku said after a half hour of showing Aizawa what he could do, "I-It's very t-t-tiring to a p-p-point that even Re-Regeneration c-can't help until I-I've passed out."

"What is it?" Aizawa asked as he looked at the small teen with the feeling of concern filling his shadow.

"I-I call it Umbra," Izuku said at a whisper as though just speaking the word scared him, "wh-when I feel an overwh-whelming 'n-negative' emo-emotion the shadows t-t-take over my entire being and rampages un-until wh-whatever, or wh-whoever, I've f-focused on is no longer a threat."

Aizawa nodded and Izuku was relieved that the man didn't ask him to demonstrate it. As much as he hated Shadow Puppet, he absolutely loathed Umbra. He had only gone into that state a total of two times, and he wished to never go into that kind of state ever again.

A week had passed since Izuku had officially met his Kacchan once again and since then whenever Kacchan wasn't training or spending time at home he was at the Aizawa-Yamada household. Izuku relished the cuddles he got from Kacchan, in any form, and the taller teen helped Izuku with signing. Izuku was on the way to being fluent enough to be comfortable with holding a decent conversation without any help from someone else to figure out a sign. Hizashi even granted him a name sign, and Kacchan gave him a cute name sign. Izuku had stared at his Kacchan with wide eyes as the taller teen explained that he had the name sign picked out for Izuku ever since he started to learn sign in hopes that one day he would be able to give it to him face to face. He took the two name signs with happiness and was taught their names signs, as well as the one Hizashi made for Aizawa.

He even asked his Kacchan to teach him two special signs in hope that he could use them in the future.

But that was for the future, at that moment, Izuku looked down at the large cityscape in one of the school's gyms. There were robots everywhere and kids around his age fighting against them. There were a few kids that had caught his eye and he wondered if they could become friends one day if they made it into UA. One kid had blond hair and a strong looking tail! The second kid had really dark skin with white hair just like Izuku did and could disappear into the shadows. The third kid that caught his eye had a bird head, one of his favorite types of animal to change into! And the last person to catch his eye was like a smaller Aizawa. He had gravity defying hair and tired eyes. Izuku watched as this one bashed robots with a pipe or tripped them up to fall.

Izuku could see that Aizawa was paying particular attention to this person as well which peaked Izukus' already tweaked interest. Izuku let out a squeak as he tapped the glass, getting the majority of the teachers' attention. The teen turned to Aizawa and signed that he would like to go down and watch closer, but was denied by the man.

"They're taking their test Izu," the man said as he wrote something down on the tablet the man had, "You can't interfere with them." Izuku let out a small whine as he let his lop bunny ears droop further. He really wanted to go see the purple haired teen closer. He looked as though he would give the best hugs, besides his adults and Kacchan that is. Izuku couldn't help but reach up and begin to brush the bottom of one of his bunny ears in comfort as he watched the purple haired teen bash another robot in its head.

"Alright! Let's release the Zeroes!" Nezu announced as the bright red numbers on the wall hit the last five minutes of the exam. Izukus' ears twitched as he heard the click of the button from behind him and watched as the ground in various areas began to open up to release absolute monstrous robots. Izuku frowned as he watched the other teens begin to run away and wondered why they would. It was just a robot. He had to fight those all the time in the facility when the trainers didn't feel like fighting against him. They had kill switches that were easy to locate if you knew the bots well enough.

Movement near one of the robots caught his eye and he let out a concerned chirp and pointed it out causing one of the adults behind him to bring the footage up to a bigger screen so they all could see what he saw. There was a girl, brown hair and eyes with chubby pink cheeks, trapped under a bit of rubble. The purple haired teen was beside her with the pipe he was using as a weapon wedged under the rubble and was trying to use it and his weight to get it off the girl. The large robot was a few yards away from the two and was already starting to lift its arm to slam down.

"Maijima, hit the kill switch," Nezu said but once the man did the adults started to become frantic when the button didn't stop the robot like it should have. A few of the teachers rushed out of the room, but Izuku knew that they weren't going to make it in time. So with a small growl Izuku stood up and used Shadow Puppet to teleport to right outside the window making the rest of the adults rush to the window to get him to get back inside.

'She could die,' Izuku thought, 'I can save her. Like a Hero would.' with that thought and the feeling of determination Izuku jumped from the ledge. He quickly transformed into a peregrine falcon and zoomed his way over to the robot. He passed so many teens and a few that exclaimed about him, but Izuku ignored them. Purple and Pink needed him.

As soon as he got to the two and the robot Izuku dove down and transformed back to his human self right after getting onto the robot. He quickly located the panel that hid the important circuitry for the robot and clawed his way in. Izuku took a quick moment to look over the wiring and found the shut off. The white haired teen took a deep breath as the robot powered down after he snipped the wire that sent power to the robot. Just in time too, as when Izuku poked his head over the robot's shoulder the hand of the robot was a couple of yards above the two teens' heads.

Izuku let out a small purr as a job well done to himself before he clambered down the large frame just as he heard the alarm for the end of the exam. By the time he made it down several other teens began to gather around making Izuku nervous, but he still had a job to do. The smaller teen made his way over to Purple and Pink and observed the situation. Without saying anything Izuku quickly transformed into his elephant form making the others that had gathered around let out exclamations of surprise.

Izuku used his trunk to carefully take the pipe out from where it was lodged and instead used his tusk to carefully lift the rubble off of Pink. With the rubble carefully placed to the side Izuku changed from an elephant to a small bird and flew up to Purples' shoulder. Just in time too with Aizawa making his way over with Cementoss and Vlad King. Izuku tried to make himself small against Purple, but it was no use as Aizawa let out a sigh when they made eye contact.

"Everyone with no injuries can make their way back to the auditorium for further information on when they can get their results," Aizawa announced making the teens look at him as Vlad King carefully picked Pink up and carried her away, "Anyone with injuries is to see Recovery Girl near the exit doors before making their way to the auditorium."

Izuku watched from Purples' shoulder as the teens began to leave, but as Purple turned to leave Izuku saw Aizawa reach out and snatch his tiny bird self up from his shoulder. He saw Aizawa wave Purple on when the teen turned back around after the snatch and Izuku lifted a wing as if he were waving to Purple. Now that the overwhelming feeling of everyones' shadows and emotions were gone, Izuku could feel the exasperation in Aizawa shadow along with a slight swirl of being scared that had begun to fade already. When Izuku looked up he saw Aizawa looking down at him with a disappointed look in his eye but Izuku could feel the smidge of pride in his shadow.

Even with the pride, Izuku had a feeling that he was in a bit of trouble.