A/N: Hey guys! This is my first fanfic ever, so please don't hate! I have had this idea for forever, but never really got the chance to peruse it. I'll try to update as much as I can, but no guarantees cuz I'm a really busy person... well anyways, hope you enjoy my BNHA and Assassination Classroom crossover! And just a side note, sorry if the chapters are short... also, please give me advice! I wanna get better at writing! Ooh, and Nagisa is gonna be like... seriously OP. Just a warning. Alright sorry for the long intro, hope you like it!

Nagisa POV

I blinked once, then twice. What was this? I was in my room, my eyes closed, pondering what my live had been so far. I was a retired hit man, working for the government as one of the highest levels. I was also successful, and I didn't eat anything poisonous... so... did I die of old age?

Suddenly, I jerked back to reality. Wind was blowing my face, and even though all I could see was white on and one in the vast space, I noticed something ahead. Oh god... it was a wall. I closed my eyes, positioning my arms in front of my body for the impact, squeezing my eyes shut to prepare for the collision.

But, it never came. I blinked, looking around me. Hmm... everything was black. Wait. I saw me. And Koro-Sensei? But he had di- oh right, I was also dead now.

Then were the images flashing around me memories? I tried to look at one, yet as soon as I had started to interpret the picture, it switched. Then, everything went black again. I couldn't see my own hands, and yet, before I could react, I was suddenly on a mountain. Now that I look at it... I turned around and my eyes widened. There was the old school!

"Class 3-E!" I hadn't realized it was out loud until I heard a giggling behind me.

Then that meant-

"Koro-Sensei!" I yelled, spinning around and coiling my legs, using all my might to jump on him, wrapping my body around his, not being able to disguise the boyish joy I felt for seeing him again.

He giggled again, using a tentacle to set me down.

"Gee Nagisa, not even a 'hello' to your other mentors?" A female voice sounded from behind me.

"No kidding, we lived longer than that octopus did." A familiar tsundere piped up, seeming to be next to the woman.

"Kurasuma! Professor Bitch!' I yelled in response, again, turning around and hugging my other teachers.

"Oof." Kurasuma grunted, recoiling from the force I had tackled him with. Irina just smiled, the fat on her chest lessening the damage.

"Y-you guys..." I stuttered, tears forming.

"Nice to see you too Nagisa, but unfortunately not for long." Koro-Sensei spoke, alarming the bluenette.

"Huh? W-why?" I asked, panic laced in my voice.

"Well, all of class 3-E has been chosen to be... dimension assassins, or something like that" Irina shrugged nonchalantly, though looked a tad bit sad.

"N-nani?" I exclaimed, upset that I wouldn't see my teachers again for a while.

"Ah, don't worry Nagisa. We are accompanying you for your first trip." The giant octopus chimed in, the ever present smile on his face.

"So... you're coming with me to this universe?" I asked, a tad bit shy and hopeful.

The creature's face flashed orange, a red circle surrounding his small features.

"Correct." He chimed, laughing his signature laugh.

"A-ah. Thank god" I sighed, a comedic relief washing over my previous worry.

"Karma Akabane will be accompanying us." The octopus added on, green stripes presenting themselves on his yellow sphere of a face.

"Really? Yay!" I cheered, oblivious to all of the teachers' smirking faces.

"Oh, but he has to be a villain, as do I." Koro-Sensei added on, his face turning blue and tears leaking down from the black ovals that were his eyes.

"At least until we meet for the first time!" he said, his face going back to normal.

"A-alright. But how do I act normal?" I asked, getting over the initial shock of not being alive and moving on with the mission.

"Well, you're going to be born again, and all of the information will come rushing into your head. It might hurt, but I'm sure you can handle it. Now let's go. We're going to be late." Kurasuma snapped, tick mark appearing on his forehead.

"Okay honey, let's get going!" Irina cheered, looking as happy as ever to be the tsundere's 'soulmate'.

I took a deep breath, and Koro-Sensei wrapped himself around all of us, a soft white glow replacing the peaceful background once again.

I felt a cold rush of air against my body. I tried to clutch onto one of my teachers, but only to be met with more air. I shivered. I wrapped my arms around myself only to realize... I was fat!

Wait. I tried to force my eyes open, and after a couple of unsuccessful attempts, I finally managed to. Yup. I was a baby. I moved my fingers and toes, testing my mobility. Okay, I could control my movements, that was good. After a while of body checking, I felt a pang in my head. Quirks? All-Might? Oh. This was the information. Yeah no kidding Kurasuma, this did hurt. A lot. I whimpered, Trying to bear the pain. luckily, it ended as soon as it started.

Oh look, my target was All for One, the leader of the villain group that was my target and didn't exist until I got into UA, a school. This would be easy, almost too easy, seeing as I could probably already kill someone and had graduated college. Hmm. My life was going to be very boring.

Except... I could turn invisible and heal myself, and grow demon horns and a halo, and one demon and angle wing on either side of my backs. And I could shoot red and white energy beams. Well gee, according to the information, most people only had one power, and pretty useless one at that, but look at what I could do... and without a drawback at that... god I was really strong.

"Why isn't he crying?" A woman asked worriedly.

Uhh... Who was that? Why was she- right, she was probably my mom. Okay, she seemed nice, and she was practically leaking out a protective feel, I didn't want to worry her.

"Well, I read somewhere that sometimes babies don't cry, and if they don't, it means they;ll be smart in the future." A guy said in a soft voice. Ah. He must be my father. He was kind of dumb, or just flat out too trusting, but he seemed like a fair guy. Even though he had said these words, I could tell he was upset, because he was looking at me, mirroring my Mom's expression. Oops... I giggled, and moved around my arms a little bit, latching on to my mother. She gasped, then her scared face filled to the brim with compassion, and she started crying.

"Oh, he's the best little thing that has ever happened to me." The woman said, hugging me closer. The doctor smiled, and told us that she'd give us a little time.

"Hey, he really looks like a girl..." my dad observed, not of ill intention, but I froze nonetheless. What if they didn't like me? I panicked.

"Won't he get bullied for it?" my father continued. Oh, he was only worried for my safety. I breathed an internal sigh of relief, thanking whichever beings that sent me here that my parents loved me this time around.

Time passed so quickly. I was already a teenager, and had already developed all of my quirks. I loved my parents dearly, and I could tell that the feeling was mutual, due to their constant fussing over me. This was nice. Well, at least until I had to go to school. I was in my last year, and I had to chose if I wanted to be a hero. I mean, In order to kill my target, I had to.

My new School seemed more like jail then a real learning facility, and the only fun thing to do was to taunt the teachers. Well, the only fun thing to do was probably to taunt the teachers, because today was my first day. It was fun in Elementary though, so hopefully it still was. If it wasn't, I would die of boredom.

I hope the kids don't hate me... I looked in the mirror, and examined myself. For some reason, I had to wear a uniform, not that I minded, because I looked pretty cute. My hairstyle never changed, and by that I mean keeping the pony tails that Kaede-Chan gave to me on my first day of school. It was like a memory of my first lifeline, something that I could keep with me throughout the years. Well, that and the fact that I was pretty sure that I would be cursed with azure eyes, baby blue hair, and girly appearance for the rest of my life. Well, rather like endless lives..

Shrugging that off, I gave myself one last inspection. I had beige dress pants, without a single wrinkle on them, courtesy of my neat-freak mom. I was wearing a white dress shirt, and a black tie, accompanied with black dress shoes and a cream colored vest.

It looked exactly like one of my outfits from my original life. Also, I had learned one more thing. I couldn't die. My healing factor would quite literally resurrect me, but I'm assuming as soon as I kill one for all, I will be able to die. I just want to see Karma and my Senseis' again.

"Hurry up Nagisa!" My dad called.

"C-coming!" I yelled in response, but not before falling down the stairs.

"Oww..." I moaned, my body promptly clicking and snapping back into place.

"Your quirk 'healing' is really useful, eh? Especially for a clumsy boy like you. Not only that, but also your 'hybrid' thingy." my dad snickered, mouth full of rice and vegetables.

I looked away, embarrassed at the names I had chosen when we got my quirks registered. It was a good idea at the time.

"Finish your vegetables before you talk, dear!" My mom called from the kitchen, over the sounds of sizzling and pots clanging on various other things. Me and my dad let out dual sighs. No matter what we did, Mom would know.

"What time is it?" I asked.

"Well, it's 7:50, why?"

I froze. "Dad."

"Yeah...?" he responded suspiciously, looking up from his precious food.

"School starts at 8:00."

His eyes widened, and he slammed his half-eaten meal on the table. I grabbed my bag, and he grabbed his jacket and keys, and with that, we both dashed out the door and into the car, going right under the speed limit until we got there. He had agreed to drop me off on my first day. I gave him a quick kiss on the cheek before hightailing my way to my classroom. I busted open the doors, and rushed to a seat, sitting down next to a boy with green hair and four freckles on each cheek in the back of the classroom, pretending like I was there the whole time.

He glanced at me and mumbled "you can do this, Izuku" under his breath, before nervously looking up at me and smiling, sticking out his hand and blurting out: "Nice t-to meet you, m-my name in Midorya Izuku!"

Aww... this boy was cute. I giggled and responded "Nice to meet you Izuku-kun! My name is Shiota Nagisa, but you can just call me Nagisa." I shook his hand, and using his weight against him, pulled him into a hug.

"E-Eh? Why'd you do that, Nagisa-kun?!" He squeaked.

"Cuz you're cute!" I answered, letting go.

I sat back down, and gestured for him to do the same, and we faced each other.

"So, what's your quirk?" I asked curiously, making small talk before the teacher came in. I had documented everyone that I talked to's quirk, to choose my allies carefully when I had to fight all for one. My question seemed to strike a nerve though, because he looked down at his desk.

"I-I understand if you don't want to be my friend after this like Kacchan, but actually, I'm... quirkless." He practically whispered the last part, and was fiddling with his fingers.

Who the actual heck was Kacchan. I would smack the living hell out of that boy who hurt my cinnamon roll.

Izuku noticed I didn't say anything, and said "I-I knew it... well, it was nice talking to you. Kacchan calls me Deku, because it means useless... you can too, if you want..."

I snapped my head up and smiled without emotion, "Where's Kacchan." He jumped a little, and pointed to a porcupine with red eyes.

I softened my face, grinning at the boy. "Deku also sounds like 'you can do it', though." I told him, smiling, before slowly walking up to the bully's desk. I shot a look back at the kawaii broccoli, and he looked dumbstruck. I made a friend today.

I turned back to the task at hand, and gently placed my hands on the wood of the boy's desk. He jumped slightly, before smirking.

"Hey new girl. I won't attack you. I mean, if you become my group's lapdog," He cockily introduced.

"Why. Why attack Deku," I asked, growling.

"Oh, the shitty nerd must've sent you here! That damn idiot!" He took his feet up from off the desk, and crossed his arms, scowling.

One of his lackeys nodded, saying, "When will he learn that Bakugo Katsuki-sama is the best!?"

"One, I'm a boy. Two, you're insane. And three, I can wipe that smirk off your face without even touching you," I said with a sickly sweet voice. The fat winged lackey near me shuddered, and looked at Bakugo.

He scoffed and replied "Ha. You're insane. I could kill you instantly."

"Oh, really? I'm pretty sure it's the other way around." I actually felt bad for the boy. He didn't know what was coming for him.

I stood back and stretched, a sociopath like glint appearing in my eyes. He noticed and shivered a bit, but stood his ground.

"Just die!" He shouted, standing up so he was taller than me.

I started laughing quietly.

"What!? You piss me off more than the damn nerd does!" He yelled, face contorting in anger."

I stopped giggling, and settled with a content smile. "Watch and learn." With those few words, I pushed him back down into his seat and released my blood-lust. Luckily, I only used 5%, otherwise, he might die of shock.

He gaped and froze up, staring at me with fear.

"Now. Don't touch Deku, got it?" I said, eyes dangerously, eyes glowing with malice, an obviously fake smile gracing the bottom half of my face. He nodded, and as a contract, I slammed one of the many knives I had with me onto the table right next to his hand, drawing some blood but not hurting him too much.

With one swift motion, I pulled it out and put it back where it came from, wiped the blood off, and proceeded to walk back to Deku.

I looked awkwardly at him, and stood there awkwardly, nervously muttering "Uh, sorry you had to see that, hehe... I tend to lose control when it comes to my friends..." He nodded, and stared at me with wide eyes.

"T-that's fine! A-and Kacchan isn't hurt... right?" He asked with worry.

"No. Not physically, at least." I smiled

"Okay good. But that was so... cool!" He shouted. "Is it your quirk?!" He continued, eyes sparkling, and whipping out a pencil and a notebook.

"Uh... no? It's kind of just like an add on." I answered, relived he didn't reject my friendship.

"So what is your quirk?" He asked, pausing his writing for a bit.

"O-oh, uh..." I stuttered, not exactly wanting to answer his question. He seemed to get it, and smiled reassuringly. I breathed a sigh of relief.

The teacher came in at 8:05, and deciding to poke at him, I raised my hand. "Uhh, yes," he started, looking at a list and finishing with a "N-Nagisa?"

The imbecile didn't even know my name yet! I stood up, and in the most respectful voice ever, said "Excuse me sensei, but why are you late? Even I wasn't."

He looked quizzically at me before retorting "I am one minute late young lady, and plus, I was on campus at 7:55"

I stared at him. "Sensei. I'm a guy."

"You- Wha- I don't..." he mumbled before giving up and deciding that I wasn't worth his time.

I giggled, and sat back down. Izuku-kun smiled brightly at me. Oh my god this kid is so freaking adorable, I thought.

The teacher cleared his throat and dropped his papers on his desk, the same tests that were meant to be taken by us.

"So, I could grade you based on these tests but... why bother? I know you all want to be heroes!" And with that, the short blonde man threw all of the papers behind him, and the class erupted into applause.

I rolled my eyes. Kids these days... still, I needed to be one too, so, why not? Everyone then started to show off their quirks, and I grinned. Might as well have some fun. My eyes glowed bright blue for a second, before a halo and horns sprouted from my head, wings unfolding and stretching. A couple of people looked at me in wonder, including Izuku-kun, and I winked at him. He just smiled and looked down dejectedly, barely raising his hand, arm down. Poor boy.

"Alright alright, I get that you're exited, but no quirks in school, got that?" the teacher threatened.

"Ha, nice joke teach. Don't compare me to these losers. The'd be lucky to end up as a side-kick to some washed up D-Lister," the one and only Kacchan scoffed.

Once again, the room exploded with noise, people shouting about 'You think you're better than us Katsuki?!' I giggled, sounding a little too much like the octopus. Uh oh, I don't want to end up like him... I thought, shivering. The dear pervert was not a good role model.

Then, the teacher said something about UA, and the class, once again, started murmuring. Oh, wait, it has a .2 acceptance rate? That's not good...well, either way, I thought, as Kacchan jumped on a tale and started bragging, I needed to.

"Oh yeah, Midoryia, don't you want to go to UA high too?" The teacher innocently asked. The said boy jumped in fear, and put his head down as Kacchan stood there in fear. This may be my first day at this school, and my close to last one, but I won't stand bullying.

Everyone looked at him and burst out laughing, talking about how he was 'quirkless' and all that. I looked down.

Katsuki jumped Izuku, blasting his desk to smithereens, the small boy dodging just in time and falling on his butt.

"Deku you're even worse than all these rejects. You really think they're going to accept you into UA?" Porcupine barked, me standing up and causing my chair to slam onto the floor. A snake slithered through the door way, and I walked behind him, the cobra identifying my movements and wrapping around the middle school boy. Huh, a new quirk? I thought, flexing my hand. A rush of information made it's way into my head as I thought this, and from the looks of it I was right. Snake Call: Teleports a snake to the summoner, snake helps the person. Person can create venom, and has fangs to pierce skin. Drawback: Snake demands to eat after attacking. This was the first quirk I had with a draw back, but it was pretty powerful, so I didn't care. I could feel the venom, and I knew everything about it. Not that much is paralyzation, medium is knockout, a lot is death. Cool.

"G-gah!" Katsuki yelled. "G-get this thing off me!"

Oh, right. I snapped, and the snake dissipated. The ashy blonde growled and glared at me, but sat back down

"T-thanks Nagisa-kun." Deku said, giving me a thankful look as I helped him up. "Y-you see, I've wanted to be a hero ever since I was little"

"Me too!" I lied, sitting down and scooting over to give him space at my desk.

The rest of the day passed without any incident, and after talking for a while, I parted ways with the boy, walking to where I needed to be. Where we would meet All-Might, or should I say Yagi Toshinori.