Crossover Together

The class was just starting up science again. However, instead of astronomy like they've been doing, Korosensei mixed things up and decided to drop chemistry on them. It's a wonder why homework wasn't something given to them yet. The class was currently in full swing, students partnered up and working on their chemicals. Korosensei, dressed like a legit scientist, walked around the students and checking their work. Greninja was, as usual, watching from the sidelines as they worked. Among them, Nagisa was partnered with Luffy for this experiment, their main chemical creation in front of them. Both of them had on a lab coat and goggles, as instructed.

"Ok, Luffy, ready to add the other chemicals?" Nagisa asked.

"Got them right here," Luffy said, holding out one of the cylinders for the experiment. Before Luffy could add in anything, Korosensei moved over to them and observed their progress, giving a chuckle.

"Good work, boys, getting some good chemic power here," Korosensei congratulated, looking at the bubbly formula in front of them. Luffy held the chemical over the main mixture, and poured it in, making the chemical mix calmly within the large cylinder. Korosensei was simply pleased, but Greninja was starting to get a bit worried over the chemicals.

"Sweet! K, one more thing," Nagisa said, holding one more flask in his hand. The frog was the only one worried, as Korosensei stepped back, letting the two get ready. Nagisa began readying the chemical, but as he started to, the flask in his hand started to slip! Nagisa tried to keep it from falling, but, the flask got out of his hands! Luffy intervened and tried to catch it, until he finally got a grip...The flask upside down. Koro, Nagisa and Luffy saw all of the contents poured right into the mixture below. The mixture bubbled violently soon afterwards, and only Korosensei could bolt out of the way before it suddenly exploded! The explosion got everyone's attention, shielding from the sudden smoke cloud. Everyone in the class looked as the smoke cleared up.

Nagisa and Luffy were gone! No true cloud, no evidence, just flat out vanished! Course the students were surprised, and Korosensei was in total panic! Greninja got shocked as well, though barely showed it.

"Nagisa?! Luffy?!" Naruto gasped. However, when they looked, their looks of shock turning into astonishment upon what they saw. On the floor, they saw the lab coats and googles just laying there on the floor. However, both coats had something moving around for a little bit. Eventually, two figures popped out from under the coats, fully clothed, and just as freaked out as the others were. Nagisa and Luffy were fine, but had shrunk!

"W-WHA?! What happened to us?!" Nagisa screeched. Karma towered over them like a giant, and picked them both up off the ground by their collars, smirking at them both. Korosensei was left blank-faced, his head white with his mouth a small slit, as Greninja just stared, eyes wide.

"Well, I always pictured you as short, Nagisa," Karma joked.

"Whatever, just put us down," Nagisa groaned, being put down on the table.

"God, God, God, how'd this happen?! Ok, ok, ok, calm down Korosensei." Korosensei tried to calm down before thinking straight, but Luffy was still fuming.

"You son of a bitch, what did you put in those damn chemicals?!"

"I-I-I didn't mean -"

"Didn't mean what, you dumbass?! Fix us right now or your dead meat!"

Much to their annoyance, some of the students giggled on seeing a tiny Luffy so upset. What got everyone surprised was that another chuckle was made, and saw Greninja turned away. Seemed even the ninja frog can't keep a laugh in.

"Ok, ok! Look, we can't keep you two like this, so you're going home until I figure it out. I'll call you two sick, and that'll be that," Korosensei concluded.

"And how are we gonna get home by this week?" Luffy asked, arms crossed. Yet, Korosensei looked surprisingly worried, trying to think.

"Couldn't you take them home?" Naruto asked.

"No way, I got a meeting today, I can't run off! Greninja, can't you -"

"No, I'm not running around in the daylight in a populated area. Hard enough that Bisharp showed up, don't need the rest of Tokyo at risk."

"For god sake - uh, uh..."

Before Korosensei could think of anything, suddenly Ren opened the door, and whistled, good and loud. Seconds later, a particular blue dog, Weed, raced over to the classroom. Since finding out about that Multitype two days prior, Weed had stuck around with Nagisa and the others.

"What's wrong?" Weed asked. Ren walked over, picked up Nagisa and Luffy, and showed them to Weed, the dog as shocked as everyone else upon sight of them.

"Take them back home. Nagisa knows where to go," Ren instructed, setting them both on Weed's back. The Akita was still a bit surprised on seeing Nagisa and Luffy mice-sized, but, he agreed anyway, and began running off. After that, Ren turned to Korosensei, anger on her face enough to spook Korosensei even more.

"You better have a cure."

~~

After a good bit of running, Weed was at the front of the school, though, was unsure on where to go at first. Nagisa and Luffy could only just hold on, as Weed started to run to his right, trying to remember where he came from, while chasing Nagisa upon arriving. It was rather good that not many people were out that day, giving Weed the right of way. The Akita did eventually stop once he was where he first saw Nagisa (which took thirty minutes). The problem; Weed can't talk to Nagisa like he can to Ren, so asking directions wouldn't end good. Weed looked down each sidewalk, trying to think.

"Weed, what's the matter?" Nagisa asked. Weed looked back to him, ears folded back. Nagisa didn't understand him, but could take enough of a hint. So, Nagisa looked around, trying to figure out where they were.

"Straight ahead," Nagisa said, as Weed started going ahead. While Weed was running, the group didn't notice a passing crow nearby. The bird looked down to the dog, seeing the tiny potential snacks on his back. Suddenly, the crow dove down, starting to pack at Weed!

"Hey - ow! - son of a - ACK! - go away!" Weed said between pecks. However, Nagisa and Luffy were having more trouble staying on, and eventually the crow bolted, snatched them both, and flew away!

"Nagisa! Luffy!" Weed gasped, watching them being taken away in the crow's beak. Weed quickly gave chase, not taking his eyes or scent off the bird as it flew fast. If Weed lost them, who know where they'll end up?! The crow kept flying around the building and obstacles, which Weed had to deal with as he ran after them. It was becoming more and more difficult, as the bird flew past a street corner. While it did, Weed failed to notice what was in front of him, and suddenly ran into something hard. Both figures stumbled, Weed getting up first.

"Weed, there you are! Where were you, Mel and I were looking everywhere."

"GB, good to see you, but I gotta go!" Weed was suddenly running again ... Only to find the crow already gone. Crud. GB went over to him.

"What's the hurry?"

"GB, a crow took my friends, but it's gone!"

"... Wait, what?"

"Just find Mel, and help me find it, I'll explain later," Weed ordered. GB saw how serious Weed was, and quickly rushed to get Mel while Weed ran off looking for the bird.

~~

Meanwhile, Korosensei was back in his office, at class 3-E. In the room, he was pacing back and forth, many thoughts going through his head. For one, the dilemma of how to communicate and translate from Weed to the class was there, but also how to go along with the idea of the principal visiting him. He had on his disguise from before, just in case. He made sure Greninja was gone from the place before the meeting could take place. Korosensei needed to go through the meeting well, otherwise it'll be a total bust.

"Ok, Korosensei, you got this. Just go through this meeting and you're all good," Korosensei told himself, looking out his office window. While trying to relax, he heard his door open behind him, hearing someone come in. With a sigh, he put on his smile, and turned to face whoever it was.

"Hello there, good sir! How may I -" Korosensei was completely cut off on who he saw standing there. The man looked normal enough, principal attire and all that, but what got Korosensei's attention was the man's face, his eyes and smirk holding a sinister grin to it, like Karma would have on his face. Korosensei's look of confidence turned blank upon sight of him, as he walked over. Next to him was a literal supermodel of a teacher (with huge boobs to boot!).

"Good afternoon, Korosensei. Gakuho Asano, school principal. Though, I'm sure you knew that from my letter for you? This is Irina Jelavić, high level language instructor." Korosensei was kind of not paying any attention, perverted eyes fixated on the Irina... Or rather, her breasts...

"Up here, pretty boy," Irina said, moving Korosensei's head up to look at her face.

"...What did you want to talk about?" Korosensei asked, as Irina had a seat alongside Gakuho. Korosensei still wasn't so sure on the meeting, but, Gakuho was pretty calm and collective. It's like if Nagisa and Karma fused together and grew ten years older.

"I'm interested in your methods, actually. You came here because you wanted to teach the 3-E class, correct?"

"Yeah?"

"Good. Well, I think you should be aware of my 'Ant System'. It's essential if you're going to keep working for me."

"Ant? System?"

"Correct. You see, Korosensei, in an ant colony, you got the workers amongst the colony, while a group of ants slack off and stay on the bottom, the rest trying to keep from becoming apart of that crowd."

"... Um, what do ants have to do with running a school?"

"Simple: class 3-E is the slacker ants, while class 3-D through A are the elite. I expect thing to stay that way while your working here, am I clear?"

"Isn't that a bit unfair?"

"Not at all. So long as the students have an example of what not to be, they'll try their hardest to avoid becoming that class. As such, that makes this school the most successful," Irina explained. Korosensei was truly feeling rather uncomfortable with the situation, as they both turned to him.

"We're not going to have any trouble, are we?" Gakuho asked. Korosensei felt a deep inner panic, as Gakuho gave him the same sinister look. Korosensei began breaking into a cold sweat, as he nodded.

"No not at all!"

"Good. Have a good day, sir. Come on, Irina," Gakuho said. After that, Gakuho and Irina both left, leaving Korosensei in a cold sweat. Now he had two different bosses to listen to, both equally sinister.

~~

Seemed a lot more time had passed than any of them realized, as the crow flew away from the central town, and off to the suburban areas. Luffy and Nagisa. Were carried some more until the bird found a large, healthy tree near a suburban home. The crow happened to be a mother, bringing the two back to its nest for its chicks. The crow landed gently, dropping them both in the nest.

"Oh shit, we're bird food!" Luffy said. As one of the chicks (which was about the same size as they were) started going over to them, Luffy quickly grabbed a stick and aimed it at them like a sword, as Nagisa tried to think on what to do.

"Stay the hell back!" Luffy ordered, only getting a small peck by one of the birds to the forehead. The hit made Luffy wave around the stick like crazy, but, it didn't help at all. Nagisa tried looking around, and noticed that the branch they were on reached out close to the house upper window; their only chance they got. Without any time to explain, Nagisa grabbed Luffy's arm, and made a mad dash out of the nest!

"Go, go, go!" Nagisa yelled, as the crow took flight, going back to get them. As they kept running, the branch they were on got thinner and thinner as they ran, eventually the two having to jump! Nagisa just made it, and Luffy nearly fell off completely before Nagisa grabbed and pulled him in. The crow flew at them after they did, but the wind brought up by the bird's wings started to blow them back into the room! One more blowback, and the two were blown into the room, the two falling backwards. Only then did the crow stop, and left them alone. Luffy and Nagisa picked themselves up after a bit, and looked around on where they've fallen into.

To their size, the room was simply huge, though was just like any other room. There was a bookshelf by the closet to their right, a single bed by the window (which they were on), and a counter study to their left. While Luffy had no idea on where they were, Nagisa was getting a rather small guess...

"Hey, what's the time?" Nagisa asked.

"Time? Why?"

"Do you want to get caught like this? Just tell me the time, maybe we can get out before anyone notices." Luffy started to look for some sort of time piece, until he noticed a digital clock by the bed...

3:03

"What the hell, How'd a crow carry us for six hours?!"

"Calm down, Luffy, we got plenty of time to get out. Come on, let's go," Nagisa said, trying to find a safe way off the bed. After moving around for a little bit, eventually the two moved off the bed, and onto the cloths cabinet. Everything just seemed much larger than they could ever think, it was rather difficult for a safe way down. However, as they were looking around, they both suddenly heard footsteps just outside of the room, coming towards the door!

Great, even more trouble.

The two, having little to no options at the moment, quickly took the hiding route, and got into one of the dresser cabinets just before the bedroom door opened. Nagisa and Luffy both heard two sets of footsteps come into the room. The two couldn't make out any voices at first, though some talking was heard from the room. Luffy was just hoping they wouldn't be found, but Nagisa was wondering who was out there, though knew better than to look and expose himself. However, there was a small opening, just big enough to see through, so Nagisa took the risk, and peeked out. In the room, not noticing him or Luffy, were Twilight and Akari! Both girls had some books with them, telling Nagisa that the two were together for homework.

"Thanks for letting me come over, Twilight," Akari said.

"No problem, Akari. I'm happy to help," Twilight replied. Nagisa sunk down into the cabinet, sitting down next to Luffy. They both knew they'll be in that room for a LONG time...

~~

Back with Weed, the Akita was trying his best to sniff out where Nagisa and Luffy had gone. It wasn't easy to catch the scent of something so small, but, he had to try. GB and Mel too were trying their best, following the similar trail that the crow took.

"Damnit, we've been searching for hours. GB, you sure you know where you're going?" Mel asked.

"Course I do, this nose hasn't failed me yet," GB replied, continuing to sniff around. Mel just groaned, but continued on. Weed, GB, and Mel all kept following the scent for a while longer, GB leading most of the way. Weed could only wonder what trouble those two were actually in.

Back at the house, Luffy and Nagisa hadn't moved from their cabinet for about an hour, Twilight and Akari still looking over their answers, small talk in between questions. Luffy could care less about what Twilight and Akari were actually doing, he wanted out at SOME point! Nagisa was on the same boat as Luffy, but they both knew they couldn't just rush out without being seen.

"Ok, screw this. Nagisa, open that thing up so we can get out of here!" Luffy demanded.

"Ok ok, let me check first." Nagisa peeked out of the cabinet to look around. He saw Twilight and Akari just finishing up their work, but, Akari wanted to chat some more.

"Say, Yugure?"

"What is it?"

"I've been thinking a little bit and ... well, Nagisa. You seem rather close to him," Akari said. Nagisa found it the perfect chance to climb out and get, but what Akari said got him rather curious. Luffy, not caring, quickly got out while they weren't looking, and rushed to go. However, Luffy tried to get Nagisa moving, but, the kid didn't go just yet.

"Your loss," Luffy sighed, running off out of the room without being spotted. Nagisa stayed and listened from the cabinet as Twilight and Akari continued.

"Yeah, he and I go a while back."

"Where'd you meet Nagisa anyway? Seemed like you knew him forever," Akari asked. Twilight took a minute to think, as Nagisa stayed out of sight. What was she going to say to her?

"Well... It was a long time ago. My mom enrolled me into a girls-only academy for a while when I was younger..."

--(9 years ago)--

The bell sounded off, and many of the girls started to head on home. Among the group, Twilight ventured off outside, ready to get home herself. However, before she could truly go, she noticed someone sitting by herself, her head in her knees, looking miserable. Twilight wondered what had happened to her, and began walking over.

"Excuse me, are you okay?" Twilight asked. The kid looked up to Twilight, her eyes pure blue like her hair, as it turned out.

"Huh? I-I'm fine, go away," she said, her voice oddly tomboyish. Twilight sat down next to her.

"Are you sure? You look like you're going to cry."

"I'm fine!" She protested, though suddenly tears started going down her face. Twilight didn't take the yelling too well, and turned away in a huff. That didn't help the other person out too much though, and Twilight saw that in her face.

"I'm sorry... I don't want to be here, no one bothers with me, I wanna go home," she said, the tears still down her face.

Hey, hey, it'll be ok," Twilight assured, trying her best to calm her down. Eventually, Twilight scooted over to her, as the girl actually leaned into her, still crying. Twilight did have one idea, and rubbed her head while she began to speak.

(Applejack's lullaby parody)

Don't wheep, my little child, you're loved by all you know

You'll always have your friends near, no matter where you go

There's no need to worry, so don't you cry or fret

They'll always be here for you, no matter what you get

Twilight's little song made the girl stop crying, and look to her with a smile. The girl wiped away some of her tears after hearing that. After Twilight smiled too, the girl got up.

"Thank you... What's your name?"

"I'm Yugure. What's yours?"

"I'm Nagisa."

~~

"That's so sweet..."

"I know. It's too bad I had to move away for as long as I had. I really didn't want to..."

Nagisa felt his own memory flood in with Twilight's words, the melody unforgettable. However, as he was standing there, resting on the rim, he failed to take in account of Akari looking at her dresser, catching him in it! Nagisa suddenly hid away in the cabinet, but, Akari was already over there, and opened the dresser to find Nagisa inside. Akari just stared blank-faced before she picked him up by his shirt collar.

"Uh... Hello, Akari, Twilight," Nagisa said. It didn't help what awkwardness spiraled up from the situation; especially since Nagisa was still tiny.

For the next couple of minutes, Nagisa took the time to explain the situation to Twilight and Akari, from the start of the day, to the crow flight. While to a normal person, the idea was complete bull, Twilight and Akari believed in what Nagisa was saying (as if the size wasn't proof enough). However, the idea that random chemicals ended up shrinking himself and Luffy was both fascinating and weird. Nagisa did feel a bit awkward, considering he was basically sitting on a bed in between two giant women that can easily crush him. He can just hope Korosensei had found out some sort of antidote to the dilemma by now.

"Did Korosensei figure it out yet?" Akari asked.

"I hope so, I don't wanna be rat-sized forever, I can't take being a constant snack for birds," Nagisa sighed. Despite that, Twilight was completely psyched by the very concept that Korosensei found chemicals that could result in shrinking a human being! Being a girl of science and all, Twilight was immediately fascinated by the idea. However, Twilight didn't say anything about it yet, but the look on Twilight's face told Nagisa that she had the thought in mind.

"Don't worry, Nagisa, you can stay with me until Korosensei figures it out," Twilight offered. Nagisa immediately turned red in the face upon said offer, his hands out front.

"No, no, no, I really shouldn't."

"It'll be fine, just until you grow back. Besides, do you want to go back outside?"

"...No."

"Good."

~~

Meanwhile, Luffy had just managed to get himself back downstairs, and get out to the front porch. Sure, the door was an extreme challenge to him (using the knob, plus pushing the door open to begin with), but the kid did manage to finally open the door large enough to get himself free. Upon doing so, Luffy was already winded out just from that (being so small has its disadvantages).

"Damn door. Ok, now what?" Luffy wondered, moving away from the door, and towards the road in front of him. As he was though, he suddenly heard footsteps, and saw a creeping shadow. Luffy thought of hiding away, but, before he could, he ended up spotted! Luckily for him though, the thing that did spot him turned out to be Weed, GB, and Mel. And thank god for that!

"Oh, Weed, you're here," Luffy sighed. Weed was glad to find him alive, but, Nagisa was no where to be seen. Did the crow ate him before they arrived?! Unfortunately, Luffy couldn't understand them, so, just asking Luffy where he was wasn't gonna do well. Instead, Weed and GB began looking around, following their noses for Nagisa's scent. Luffy scratched his head in confusion until the dogs got the answer themselves, finding the scent of Nagisa, leading into Twilight's house. Course the answer to getting him out was another matter entirely.

"Man, what are we going to do?" GB asked.

"I don't know, hold on, let me think," Weed replied, trying to get a proper answer. The dogs weren't aware that Twilight was inside, nor knew that Nagisa was safe in there, but, the trio of canines tried to get some sort of answer. Before they could get anything though, suddenly a shadow appeared above all of them, freaking out GB and Mel. Weed turned around quickly, and found a particular yellow octopus standing there with a flask in his grip.

"Having a good day?"

"Korosensei! You're here."

"Yep, and I got the antidote!" Korosensei said, in a sing-a-long tone, as he held the flask of antidote in front of everyone. It looked more like black ink than much else, so, it wasn't very convincing really. Korosensei, seeing Luffy standing on the ground, then pulled out a small sprayer, and put one end in the substance.

"You sure this'll work?"

"Of course, just one sip is all you need," Korosensei assured. With nothing to loose, Luffy took the risk, and Korosensei gave him a small spray. Weed, GB, and Mel moved out of the way as Korosenseri did the spray, and waited for something to happen. At first, all the stuff did was make Luffy soaked from head to toe, but then, Luffy began to feel a bit weird, as the world seemed to shrink around him. In just a minute, Luffy was quickly back to his normal size, good as gold! Korosensei was very pleased with himself for completing the task, and Luffy was glad to be at normal size again.

"HAHA! It worked! Score one for the alien!" Korosensei gloated, his face stripped with green stripes again. The outburst was caught from inside, and soon Akari looked out the window to see what was happening.

"What's going on?"

"Hello, Akari-chan! Is Nagisa in there? Alien's gotta cure with his name on it!"

No sooner after that was announced, Nagisa was brought outside by Twilight, and put in the same spot where Luffy was sprayed down. Korosensei got everyone out of the way as he was sprayed down, ending in the same result Luffy did.

"Much better. Thanks a ton, Korosensei," Nagisa thanked, as the alien chuckled again.

"Piece of cake, Nagisa. Now, how's about we head home, eh? Been a rough day, I'd imagine."

"We've been dragged around by a crow all day, so, yeah." Luffy shrugged.

"Yeah, we should get going. Thanks for letting me stick around, you two, I'll see you later," Nagisa said.

After all of that was said and done, Nagisa, Luffy, Weed, Mel, GB, and Korosensei then began heading home, as Twilight and Akari waved goodbye. Korosensei simply jumped up, and flew away from Twilight's home, while the others walked. Today had been a rather interesting one for Nagisa and Luffy...

And hoped that they don't do that again.