My Hero Academia: Wolf Days

Disclaimer: I do not own My Hero Academia/Boku no Hero Academia. I will only put this disclaimer once since I think it's pretty reasonable to assume I wont be owning the series anytime soon.

Izuku Midoriya plopped onto his bed with a loud sigh, he had just finished his first day of training with his childhood hero All Might.

That was still hard to believe for the freckled teen, All Might, the number one hero in the world, the symbol of peace himself, not only had he agreed to train him of all people, he had also offered his great power, One for All.

He honestly did not feel worthy of such great power, but what was he supposed to do? Deny the offer that the great All Might had given him? Fat chance.

"I should get some sleep, I have to get up early tomorrow to go to school, not only that, I got training with All Might in the afternoon, I have to be fully energized for the challenges that lie ahead..." Izuku muttered to himself, choosing to stop his train of thought before he went on a muttering spree.

Closing his eyes, the messy haired teen drifted to the land of the sleep, a smile plastered on his sleeping face.

"Grrr..."

"Ahoouuuuu"

Izuku looked at the scene that played out before him with utter horror and shock.

Mangled corpses decorated the floor, splatters of blood adorned the walls, claw marks littered the thrashed room he found himself in.

Taking a step back in fear, Izuku covered his mouth with his hand to fight back the vomit trying to escape his body as tears streamed down his face in fear.

Looking at the bodies that laid in front of him, he couldn't but notice the dismembered head of a child that seemed to stare directly into Izuku's soul.

"Grrr..."

Izuku snapped his eyes away from the head and instead focused on whatever had growled, he quickly regretted that decision.

Izuku stared at the humanoid form of a wolf; blood, flesh, and even hair stained its fanged teeth, but that wasn't what frightened poor Izuku, no, it was the fact that it stared back.

He tried to run, but his body absolutely refused to move, he could only quiver in fear as the werewolf slowly limped over to him.

Before long, the creature was right in front of him and slowly opened its mouth.

"Raaah!"

Izuku screamed as the beast jumped onto him, its gaping maw the last thing he saw before his whole world went black.

"Guaahh!" Izuku screamed as his body jerked into a sitting position.

Sweat dripped from every pore of Izuku's body, his breaths were quick and harsh, his eyes were as wide as saucers from the sheer fear and adrenaline that pumped through his veins.

'What... was... that?' Izuku questioned himself, memories of the nightmare bombarded his brain causing him to wince and grab his head.

Once Izuku calmed down, he looked over to the clock and noticed that it was still pretty late, he hadn't slept very long.

'Guess I better go back to sleep, I just hope I don't have that same nightmare, man I felt so helpless' Izuku thought to himself, a sense of dread washing over his body.

With a loud sigh, Izuku laid back down on his bed and got comfortable.

Closing his eyes, the quirkless teen drifted off to sleep once again.

"Oh my god Izuku!" shouted Izuku's mother, Inko.

Izuku shot out of his bed at the screaming voice of his mother, moving his head from side to side to perceive any threats.

"What? Mom what's wrong?!" Izuku asked in a panic.

"Your ears!" Inko shouted.

"What about them..." Izuku began as he tried to touch his ears, emphasis on tried because there was nothing there, only his cheeks.

"Aah!" Izuku screamed with even more panic as he frantically searched for his ears.

Izuku suddenly felt a twitch on top of his head and he quickly moved his hand to touch the area in which he had felt the twitch.

"What's this?" Izuku mumbled as he felt something that wasn't supposed to be there.

"Oh Izuku..." Inko said while shaking.

"What's wrong mom?" Izuku asked, noticing the panic that his mother was expressing.

"You should look in the mirror..." she answered.

Izuku only raised an eyebrow before getting up and walking towards the mirror in his room.

Looking into the mirror, what he saw made his eyes go blank and his whole body rigid.

"Izuku? Are you okay sweetie?" Inko asked, walking over to the shocked Izuku.

Izuku couldn't answer as he stared at the various changed facial features, for one he had green wolf ears, not only that but he had more pronounced canines.

"Oh no..." Inko muttered.

Izuku was about to ask what was wrong now until he felt something brush against his leg.

Looking back he saw a small green tail wagging from side to side.

"Izuku, did you get taller?" Inko said, stopping Izuku from slipping into another state of shock.

Izuku turned around slowly to look at his mom and once again was shocked when he noticed the size difference they shared was now larger.

Looking at his arm, the shock continued as he noticed the more muscular arms and the sharper nails on his hands.

Lifting up his pajama shirt, Izuku noticed the abs that were not there yesterday.

"Gah" Izuku, in a state of shock, passed out from the surprises that kept attacking him.

Aldera Junior High

Izuku was not having a good time at school.

Yes, he had gotten taller and muscular, but because of the bagginess of the school uniform, it wasn't even noticeable, only his growth was noticed but it was written off as his one and only growth spurt.

His ears and tail was what had brought hell upon young Izuku.

Most people had thought that Izuku was trying to cosplay as some sort of wolf, but the more attentive students noticed that the more wild-like features were probably due to the manifestation of a quirk.

"So, quirkless Deku finally got a shitty quirk! Good fucking luck trying to get into U.A with a quirk like that, what are you gonna due, give them puppy eyes and hope they let your sorry ass in?!" shouted Bakugou.

Izuku could only whimper as his childhood friend, Katsuki Bakugou, slammed his explosive palm onto his desk, shattering it to pieces.

"Was this your fucking trump card shit stain? I should've known you were just all talk!" Bakugou continued.

Izuku, feeling that he was about to snap, tried to control himself from lashing out, knowing it would only end badly for him.

Suddenly, the bell rung for class to be dismissed, saving Izuku anymore trouble.

"Saved by the fucking bell, see ya later loser" Bakugou shouted as he left.

'Man, and here I thought he calmed down after that incident with the villain, man whatever happened to me hasn't had many positive effects' Izuku thought with a sigh.

Grabbing his things, Izuku left the school and headed for the beach where All Might waited to continue his training.

"So... you're telling me you just woke up like this?" All Might asked in his deflated form.

"Yeah, I know it's a bit hard to believe, I was pretty shocked myself, but, I think this might have molded my body better, maybe you can see if I can become a vessel for One for All" Izuku questioned.

Taking off his shirt, Izuku showed All Might the effects the transformation had on his body.

"Amazing! Months of training skipped in a single day!" All Might shouted, his more buff form coming out.

"Really!? Whoa that's so cool! Does that mean I'm ready for One for All?" Izuku asked with hope in his eyes.

"Haha! Young Midoriya, it is true that you have skipped months of training, but now you have to get accustomed to your new body! That means I'm going to up your training!" All Might shouted with a hardy laugh.

"Don't worry! I'm ready for whatever you have to throw at me!" Izuku declared, flaring his confidence to show his true determination.

"I would expect nothing less from you young Midoriya! Now on another note we have to figure out whether you have manifested a quirk or suffered some sort of mutation " All Might said, his tone becoming more serious.

Izuku couldn't help but gulp at the thought of what might have happened to him, could he be cursed? Maybe his dad was secretly a wolf this entire time...

All Might couldn't help but stare at Izuku as he began muttering a lot.

"Snap out of it young Midoriya!" All Might shouted as he gave him a light slap.

"Right! I'm sorry" Izuku quickly apologized.

"Now! Let's begin!" All Might shouted, raising a fist into the air.

"Right!"

10 Months Later

It had been ten months since Izuku had started his training.

All Might had upped the difficulty of Izuku's training, pushing the young teen to his upper limits.

During his first month of training, All Might and Izuku had finally learned the reason for Izuku's minor transformation.

It was a full moon, Izuku had just finished training with All Might and was about to give his goodbyes before going home when he felt a sudden surge of power rushing through his body.

Green fur had begun to appear around his entire body, his face stretched into a snout with fanged teeth, his eyes shrunk to glowing green beads, claws became clearly visible from his hands and feet, his body doubled in size, his arms and legs seemed to stretch out and elongate.

The transformation continued until all that was left of Izuku Midoriya were the bits of torn clothes on the werewolf's body.

All Might stared in shock as the freckled teen became an intimidating feral creature who snarled directly at him.

Inflating his body, All Might prepared to combat the Lycanthrope, his body tensed when the werewolf seemed to be ready to pounce.

"Uagh" the beast growled out before grabbing its head moving from side to side in panic.

'It seems young Midoriya still has some control, he's not completely lost, even so, I must put a stop to this' All Might concluded in his head.

In a swift burst of speed, All Might had appeared behind the beast and gave it a swift chop in the neck, effectively knocking it out without causing too much damage.

It wasn't until the morning sun rose and shined light upon Izuku's face that he had finally woken up.

"Are you okay Midoriya?" All Might asked.

Izuku turned to the deflated man and nodded his head before trying to pick himself up and falling back down.

"Whoa there, you should take it easy, I had a friend of mine take a look at you to make sure you were fine, unfortunately her quirk takes away your stamina in return for increased healing, although not much was needed since your body seemed to be regenerating at a pretty quick pace on its own" All Might warned.

"It seems you are suffering from a rare case of Lycanthropy, of course it's probably just a quirk manifesting after a change occurred in your body, what it might be is still a mystery, but at least we know what we are dealing with when it comes to your new 'quirk'" All Might explained.

"So... I can turn into a werewolf?" Izuku asked, a slight tinge of fear evident in his voice.

"Pretty much, yeah" All Might answered.

"Gah" Izuku spat out before his body went rigid.

"Don't worry yourself kid, it's not that bad, you know being a werewolf has its advantages such as increased strength, defense, speed, and regeneration, although you are weak to silver but that's not very common so it's a pretty good quirk when you think about it" All Might said, trying to calm the panicked Izuku.

"Wait, will it interfere with me getting One for All?" Izuku asked, his worries increasing as every second passed.

"It shouldn't, if anything this should work well with One for All, you just have to learn to control it just like you would any other power" All Might answered.

"Oh, that's great, guess I was worried for nothing" Izuku said with a relieved sigh.

"Yeah, you should get back home, your mother has to be pretty worried about you" All Might said calmly.

"Oh no! My moms gonna kill me!" Izuku shouted as he began running home.

"Just remember to come back later to continue training!" All Might shouted.

"Don't worry! I will" Izuku answered back.

It had taken Izuku four months to clear out the entire beach with his new found strength, All Might had made sure every single muscle in Izuku's body was trained and mastered, even the tail he had sprouted after the first day of training was put to work.

After the entire beach had been cleared, All Might had given Izuku the power of One for All in the form of a hair which had led to an awkward interaction between All Might and Izuku that included eating hair.

Izuku wished he could say it was smooth sailing after that but it seemed to be the opposite.

Training got even harder, All Might had begun to teach him how to use One for All without blowing up his entire body as well as helping Izuku learn to control the powers that came with his transformation.

So far, from what Izuku had gathered, he could transform whenever he wanted, he could transform certain limbs individually to the werewolf form such as his arms and legs, his powers were strong during the day, stronger during the night, and at the maximum strength during a full moon but it became harder to control the stronger his power got.

His werewolf powers allowed him to move faster, jump higher and farther, hit harder and faster, and last longer in a fight. All in all, his power really came in handy.

Progression on One for All had been... slow to say the least, while All Might was a good teacher, he never had to struggle as much as Izuku had to and thus couldn't teach him the way he was taught.

Through a show of sheer luck, Izuku had discovered that by using One for All on his entire body he could minimize the damage on his body.

Although when he tried using one hundred percent of One for All on his body, he was out of commission for an entire week which included daily visits from Recovery Girl.

Afterwards, Izuku learned that it was better to start off slow, so with concentration and dumb luck, he could surround himself with five percent of One for All by the end of the ten months, boosting his speed and strength for a fair amount of time.

But it was finally time, time for the U.A entrance exams, and he promised All Might that he wasn't gonna fail.

Raising his fist into the air, Izuku shouted a war cry to show the heavens themselves that he was ready.

"Here I come U.A!"

Hello my fair readers and welcome to my new story, I've had this thing sitting in the furnace just waiting to come out, and now it finally has, I've had quite a writers block lately and I hope with this story it can get me back into the writing groove.

I'm really excited to see where this story will go, I will try to change a lot in the story and only follow the canon somewhat because following the canon while only changing the turn of battles is not quite entertaining.

I hope you enjoyed and will come back for the next chapter!

Cya!