AN: I Don't own Assassination classroom or katekyo hitman reborn

Ren: Hello everyone Ren Heart here with a new crossover. This will be a little different considering I will be having some help. Meet my Hitman Reborn fangirl and checker YengYen27 or Yen for short. She'll also help me with any particular character features that I might have missed out or not sure about with hitman reborn characters since I'm not that big of a fan. Say hello.

Yen: Hello. We apologise in advance for any grammar mistakes we are still new to this. Also…
ISN'T CUTE LIL TSUNA JUST SHIP-ABLE? WHO ELSE SHIPS ALL27! ESPECIALLY R27, 6927 AND 1827. *cough cough* sorry my inner fangirl came out. Well nice to meet you all!

Ren: As you can see she's a mega fangirl for that series and the reason why I made this in the first place.

Yen: Awe thank you, Ren!(glomps Ren)

Ren: Ok ok let's just get started.

Expelled time: meet E class

"You're all expelled!"

No way!

"You are all expected to attend a new school as of the end of this week."

Damn it!

"Let this be a lesson to you all to behave better in your next school"

This all happened because…

We couldn't find that stupid time capsule.

In the principal's office of Namimori stood three boys in front of an unjust teacher with a bald crown head and an overly massive superiority complex.

The three boys stood in a line with disheartened faces. The tallest of the trio sighed likely in disappointment having lost this 'game' with grave and unfair consequences. His dark coloured hair sank a little bit along with his shoulders. His dark eyes casted to the ground, he thought of what would happen next.

The boy furthest to the right had his head perfectly horizontal faced down; his semi long, silver hair masked his shameful, angered face. He was practically griping back his darkest desire to blow this man sky high. His faded, green eyes sparked with fury as he planned the many ways of what he could do to end this man.

Finally, the boy in the centre, certainly the strangest of the three, for some reason or another was in his underwear and was covered in dirt head to toe. His spiked brown hair seemed to limp with his whole body slouching with depression. Slowly, he lost the will to go on at the thought of losing everything he made here in this school: slight admiration from peers, his happiest of times and memories with the chance to make more and most of all the strongest friendships you could ever imagine. After everything that happened here in this school from the hunting of their students to the battle for the rings the three of them have to leave it all behind. All because they couldn't find a stupid time capsule from 15 years ago talk about bad luck.

"Ah I don't believe this!" The Silver haired boy screamed to the heavens.

"What's wrong Gokudera?" The dark haired boy asked with a smile on his face.

"We just got expelled you baseball idiot! What do you think?" the boy, Gokudera, spat at the other boy but then his ears twitched at a soft sigh. He turned to see his saddened 'boss' and his eyes dropped, "Tenth."

"What's wrong Tsuna?"

"Oh, Yamamoto," The boy, Tsuna, greeted now awakened from his day-dream. "I'm fine it's just…" he couldn't meet his gaze and turned away. "I don't know where to go from here. Namimori is the only school I have ever been. I never thought I would be leaving it," he admitted, "we've been through so much there and to leave it all behind is sad. There's not even a guarantee that we will see each other again if we go off to different schools."

Seeing his boss so gloomy, a flame of determination sparked inside of Gokudera,"don't worry, Tenth." The boy grabbed Tsuna's hands and peered into his face with sharp eyes. "I'll find a way to fix this or I'm not your right hand man!" He swore and ran off in a cloud of dust.

There he goes Tsuna thought as he sighed again.

At this point a large hand ruffled his hair. "Don't worry, Tsuna," Yamamoto assured him with a bright smile. "I'm sure you'll think of something. Well, see you maybe." And so the tall boy waved goodbye and walked away.

Watching his friends' leave him, his head dropped and he moped on home. As he got to his untidy room he slumped onto his bed for comfort. His mind ran off in his own little dream world and he wept in his pillow wondering why he has such bad luck.

"Tsu-kun," a gentle voice called.

"Mum," he straightened himself cross legged on the bed.

With a saddened motherly gaze she sat beside him and his stroked his back. "I heard what happened". Fearful, he retreated inside his blanket yet his mother still showed a smile. "Don't worry, Tsuna, I have good news." He peeked out of his covers in wonder. "Reborn already got you a place in another school"

He emerged completely in shock, "What where?" The smiling woman handed him the papers given to her and he scanned them as quick as he can. He could hardly believe what he read. "This is…"

Back with Gokudera…

"Damn it! Damn it! Damn it!" The boy repeated over and over while relentlessly punching the wall. It stared to show its wounds as paint peeled off from the cracks. "In the end, I was no used to the Tenth," he spat in despair. "Damn it all!"

*knock knock knock*

His thoughts were disturbed by a light door knock. He turned to the door and at that very second an envelope slipped through the bottom. Curious, he picked it up and ripped the top. Inside were two sheets of paper; one was pure white with golden outline patters and black printed letters. The other was a more faded sheet of white and a peered to be freshly written by hand and it was signed by… "Reborn-san," he whispered the name in surprise and scanned through the contests of the letter. Nodding along as he read, he stared as the sheet with a smirk. "So this is my application to this new school huh? Well it's not like I can refuse a request from Reborn-san and the Tenth will be with me." His happy grin soon turned sour as he remembered the final thing. "Too bad that baseball freak is going to be there but I guess it's better than nothing. What is this place anyway?"

Meanwhile at Yamamoto's place…

"You got to be kidding me," cried an older man as he was wiping down a knife. "You and your friends got expelled? That's ridiculous!" He slashed his knife down with strong killing intent as beheaded the defenceless fish. "Perhaps I should have a word with this teacher of yours," his words sounded a lot less innocent than they seem.

"No it's ok dad," Yamamoto said waving a hand of dismissal. "I'll figure something out but…" his usual cheerful attitude changed to gloom, "but it is kind of sad to leave everyone after all, we've been through so much together and after everything Tsuna has done for me. I have to say I'm going to miss everyone."

"Ciaossu," called out a high pitch voice. There on the table was a very, very tiny person with a thin body holding an oversized head with black hair, large back button eyes and a bushy moustache. The little guy was dressed in a smart, blue mail man outfit. "Mail for Takeshi Yamamoto," the person said as he held out a letter.

Yamamoto thanked the 'mail man' as he hopped off and ran out the door. Taking out the letter we weren't expecting the contents at all. "It's a letter of acceptance," he quickly read through the details and was happy to find out his friends Tsuna and Gokudera would be joining him. "Where is this school? Oh I've heard of this place. Isn't it full of geniuses or something?"

The school, of course, they were all sent off to was the notorious Kunugigaoka junior high.

"This way please." The three boys were lead to their new class room by a smartly dressed business woman.

They found themselves on the base of a mountain and so one must ask why on earth is this completely separated from the main school campus and on top of some mountain? Just what the hell is this place? And so the trio made their way up and stumbled upon a disturbing scene as they made it to the top. There were no words for what they saw. They didn't know whether it was the fact they just climbed a 100 mile or so mountain and are completely out of breath (with the exception of Yamamoto who was smiling happily). Or the fact that students with rubber end spears were thrusting them violently at some sort of yellow, black blur swing from a tree. Once again- WHAT THE HELL IS THIS PLACE!

Yamamoto eyes gleamed with excitement, "What kind of game is this. Hit the piñata? But shouldn't they be blind folded?"

I don't think this is a game Tsuna thought with a sweat drop on his for head.

Gokudera groaned, "Just what is that thing?"

"A few more minutes of this and all is forgiven right?" Asked the blur. "You're a very lucky class I have you know. Not many teachers would put themselves in this position."

"Whoa the piñata talked," Yamamoto gawked in delight.

I don't think that's a piñata. One of Tsuna's eyes twitched at the sight.

The blur laughed cockily, "Shoot and stab me all you want class. Even with this handy cap I am too fast for you. Only in your dreams do you have any hope to get the deed done." As if lady misfortune heard the branch supporting it snapped and it popped down to earth. Only then did the three boys see what that thing was.

"It's an octopus!" The boys said at once with very different expressions. Tsuna seemed to have taken on the more natural emotions of pure shock and confusion. Yamamoto was shocked too but seemed to have a touch of interest and fun in his eyes. Gokudera on the other hand was the odd one out as his eyes gleamed with absolute joy. Actually he said: 'it's a UMA!'

"Kill him!" The students screamed as they charged with all their furry.

"Neah!" the octopus screamed. "Wait wait wait this wasn't a part of the deal!" He tumbled across the courtyard as the students tried to stab the octopus and shoot it with pink bead things. "Oh crap oh crap," the octopus murmured in panic as he avoided all their attacks. As he did his tentacles got tangled in the robe he was in. "This wasn't what I had in mind," he cried. "Stop it all of you! Stop it stop it!" he begged and to his luck he was able to escape and jumped to the top of an old school building. Posing in victory he mocked the students, "Ha ha! What's the matter children? You can't jump this high? Oh wait of course not," he laughed at their misfortune.

"Oh man and we were so close," one student yelled.

"This game looks like a lot of fun," Yamamoto awed eager to join. That's when he spotted a green haired girl with one of those spear things. He moved up to the girl. "Hey can I have a try?" he politely asked pointing to the spear.

Blankly, the girl looked at him and shrugged, "knock yourself out."

Happily, he grabbed the spear but his sunshine smile snapped to one of dark determination. He sprinted to a smaller building beside the main one then bounced on top of it and used it as a platform to get to the main building roof. He glared at the stunned octopus as he got into an offensive stands. "Shigure Souen Ryu first offensive form." He thrust forward, "Axle of rain."

"Neah!" The octopus screamed as he leaned to the side just barely escaping him.

But it was no way over. Quickly, Yamamoto turned to another offensive stand, "Shigure Souen Ryu fifth offensive form," he slashed down and the octopus moved slightly but then he unexpectedly changed hands. "Early summer rain."

Caught off guard by this entire affair and the quick change of hand, the octopus wasn't able to completely dodge the boy's attack and got a numb of his finger sliced off. He stared at his wounded hand and back at the boy, "Well played."

The boy laughed at the compliments, "Thanks but I'm sorry about your hand though." He fiddled with the rubber tip bending it back and forth, "I didn't think this rubber thing could hurt anyone."

The octopus blinked a few times. "Ah…don't worry about it," he hesitantly spoke and lifted his tentacle. "I can regenerate this quite easily." Pop and a new fingertip was born.

Yamamoto gawked, "that's so cool."

"Hold on!" bump! The boy was knocked off his feet and slid down the roof. In his place was his companion Gokudera with sparkling eyes. "Mr. UMA I'm Hayato Gokudera and I must say it's an honour to meet someone like you. Tenth, are you seeing this?" He yelled excitedly.

The still very confused octopus nodded in response as his tentacle was forcefully shaken, "Nice to meet you too. I guess?"

"I have so many questions for you." He beamed with enthusiasm, "What do you like to eat? What do you do for fun? What the heck are you made of? Some sort of gelatinous substance? How old are you? Are you some sort of giant squid mixed with an octopus? Do you squirt ink like an octopus? What planet are you from?"

"I am an earthling born and bred thank you very much!" The octopus corrected in offense.

Gokudera rubbed his chin while nodding, "I see."

Meanwhile, Yamamoto climbed his way to the top and tugged on Gokudera's trousers, "Hey, mind helping a guy out?"

"Help yourself you baseball freak!" He screamed.

Yamamoto playful tilted his head, "Oh come on give me a hand. We're friends right?"

"We are not friends!"

The awkward argument began as Gokudera screamed and explained over and over again on how they weren't friends while Yamamoto countered him with a more playful and passive tone. The rest of the class stared at their new arrivals wondering who in the world are they and what just happened? Also is one of them holding sticks of dynamite in his fingers or is it their imagination?

"I'm going blow you to pieces."

Not their imagination. "Ah!"

It was at this moment they thought that these two new guys were crazy and failed to see there was a third. This third member seemed to be not very happy. The little boy growled, "Would you two stop already!" the boy screamed and the two the other roof turned to him. "I think you two have done enough now knock it off," he said in an uncharacteristically firm tone yet his voice was a bit shaky.

Gokudera blew out the fuse and bowed apologetically, "Forgive me, Tenth!"

"Yeah." Yamamoto nodded along, "I guess we got a bit carried away."

The boys hopped down off the roof and returned to their boss. He also bowed in apology, "Sorry for the trouble my friends caused. They can get out of hand sometimes."

"No trouble at all," the octopus flew right in front of them. "You three must be my new students. I'm Korosensei and I'll be your new homeroom teacher," he introduced himself. "I'm also the one who blew up 70% of your moon."

With a smile Tsuna greeted his new teacher, "Pleased to meet you Koro…" wait what?

"I am currently the target of the entire world because by this March I will destroy the Earth like I did the moon," He continued on with a happy smile. "The rewarded for my head is 10 billion yen isn't that exciting?"

Target? Tsuna's vision started to fail as the world looked like it was spinning.

"And this class isn't just a place to cultivate and grow one's knowledge but is also a training ground for young assassins which are your classmates. You three will also train to become fine assassins as well of course."

Assassins? His vision failed completely as his body refused to function. His final visions were of Korosensei running at him and his new classmates gasping in worry. This can't be real.

"Tsuna, can you hear me?" called a voice in the darkness.

"Tenth, please get up," called another and the darkness mildly lifted.

Yamamoto? Gokudera-kun? The darkness shined a brilliant light as in Tsuna's line of sight was the fuzzy image of his two worried friends. "Yamamoto, Gokudera-kun I had the strangest dream, we got expelled and moved to a new school. There was this octopus teacher that told us we were going to become assassins and…" that's when he noticed the yellow beach-ball head smiley face next to him.

"Greetings Tsuna, I do hope you're feeling better."

Not a dream! Hiiiieee!

"Well now, since you're awake now how's about you all introduce yourselves to the class?" With a helping tentacle Tsuna was back to his feet. He then noticed he was in a classroom. The students were all seated in their rows staring at him. "How's about you all tell us an interesting fact about yourself? Why don't you go first Yamamoto?" He asked the dark haired boy.

Enthusiastically, he nodded, "Hi I'm Takeshi Yamamoto and I love to play baseball."

"No way me too man," yelled one of the male students excitedly. "What position do you play? I usually play pitcher."

"Oh I pitch too," Yamamoto matched the boy's excitement happy to see a baseball nerd like him. "But really I can play any position but I think I'm best at the bat."

"Cool."

Korosensei's smile grew at the sight of his students getting along so well with his new ones. "Very good. Gokudera, why don't you go next?" The boy just stared at him with starlight eyes. He was in his own dream world and couldn't hear a thing. Waving his tentacle in his face, Korosensei called out to him, "Gokudera ? Would you introduce yourself please?"

"Oh right," his expression flipped to a bad boy attitude. "The name's Hayato Gokudera and I'm the Vongola Tenth's right hand man."

"Vongola Tenth?" Growled the class's very own tough guy. "What's that about?"

"Oh it's a mafia game we play," Yamamoto explained joyfully.

"Mafia!" the class screamed.

"Yeah me and Gokudera play as subordinates while Tsuna plays our boss also known as the Vongola Tenth or just Tenth."

"That kid?" Heads turned to the pathetically, panicky Tsuna.

"Well this perfectly leads us to you Sawada. Mind introducing yourself?"

"Alright," nervously the small boy turned to the class. "Hello I'm Tsunayoshi Sawada but everyone just calls me Tsuna. So just call me that. An interesting fact about me is…" I'm part of the Vongola mafia family. No I can't say that! I'm the Vongola Ninth's heir? No not that. I have a baby hitman home-tutor named Reborn. I can't say that either! He rambled in his thoughts trying to find anything that doesn't sound completely insane.

"Tsuna, are you alright?" Korosensei asked concerned of his silence.

"Ah- no I'm fine," he rethought his thoughts and said the first non-crazy thing he thought of. "My mom is a great cook."

The class laughed in delight, "Aren't they all?"

Tsuna laughed nervously while Yamamoto just smiled cheerfully as for Gokudera he sent death glares that silenced a few.

"Well then let's take a look at you test scores. I need to know where you're all at." He picked up the pile of papers given to him when Tsuna passed out. Incidentally, his papers were at the top. One look Korosensei could tell that this would be his biggest challenge in his teacher career. "Tsuna, I must say I'm surprised," he started off. "Your scores are even worse than my most academically challenged student Terasaka."

"Hey!" Terasaka yelled in anger till his words hit him, "Wait he scored lower than me? Man that's pretty bad."

A tear formed at the edgy of his eye. Even in a new school I'm still no- good-Tsuna.

"Don't worry Tsuna with my help you will be soring like a bird high in the sky," the octopus teacher assured waving his tentacles for effect.

Well I kind of already did that sir. He wanted to say as he remembered his fight against Xanxus and his many battles in the future but it would be best to keep quiet.

Korosensei turned to the next set of papers, "Hum not bad Yamamoto these score are rather average around here. I'm sure you'll catch up in no time."

"I'll do my best," he cheered with a thumb up.

"Now for Gokudera." As he tuned to the final set and was lost for words. "These scores are…"

"Spit it out already," Gokudera impatiently yelled.

"These sores are immaculate," he turned the papers to the class and marked on each one was either perfect 100 or very close to perfect. The class gasped in awe. No one who has come to E class has ever got scores like that. In fact the only class who do were in A class. "Gokudera, how on earth did you get to E class? With these scores you would surely be in A class."

The boy clicked his tongue, "That man tried to separate me and the Tenth. So I had to teach him a lesson."

"Pray tell what did you do?" Korosensei asked sort of afraid.

"Oh! He was like No! And the principal was like slam never! Then he pulled out his firework sticks. Then Tsuna was like eep! And I was like whoa! Then Tsuna made them go whoosh and then they went boom!" Yamamoto explained with exaggerated hand gestures in such a strange way that it seemed like another language.

"Speak English man!"

Tsuna shivered at the thought of what happened just a couple of hours ago…

***flashback***

"After looking at your scores I have allocated you to your new classes," said a man in the leather chair. He wore a violet suit that was well taken with pride. His dull red hair was combed finely without flaw. His face wore a gentle yet somewhat fake smile as his violet eyes pierced through them. Those eyes made Tsuna weak as if they were poison. He knew this was quite a dangerous man. This principal of Kunugigaoka. "I'm afraid two of you will be going to E class. Sawada."

"Yes," the boy shirked in a girly pitch.

"You're one of them."

"Ha ha!" Gokudera cheered in victory as he shot a smug smirk to his taller teammate. "See you later baseball freak."

But his victory was shot down as the principal said, "You too, Yamamoto."

"Wait what?"

The boy laughed and slapped Tsuna's back, "Looks like you and me are sticking together."

"Hold on! If those two are together where am I?" Gokudera demanded.

The principal's smile grew, "Your scores were impressively high they can even match my five best students. With that in mind you have the honour to be joining A class. I'm sure your parents would be proud."

"I don't care about that!" He slammed his hands on the desk. "How dare you try and separate me and the Tenth? I am his right hand man and I will stay by his side no matter. I demand to be put with him!"

Forcefully, the principal slammed his palms on his desk and faced the boy with raging eyes. "Never! It would be absurd to send a bright star like you to a place where stars die or never had light to begin with."

"Does it look like I gave a damn!" Swiftly, Gokudera took something out of his jacket. "Looks like I should teach you a lesson." The unmistaken sent of burning gun powder filled the air as he held out candle like sticks between his fingers.

"Eep!" Tsuna screamed. Those are Gokudera bombs!

"Whoa!" Yamamoto awed. "You still carry around those firework sticks?"

The principal wasn't dumb. He knew exactly what those 'fireworks' were but even if he did know he had no power to stop it. So he just sat there in a daze.

"Look out," Tsuna's body acted on its own as he grasped the stick of dynamite and flung them out the window. They spun above the stunned principal's head then boom! A massive puff of smoke gathered outside where the explosion took place.

The principal turned worried to see the damage. To his relief nothing seemed too broken as the smoke cloud clears. Besides some screaming everything seemed to be in order. He turned back to the three boys with and creepy, blank face "All of you. E class. Now."

Meanwhile back at E class…

"Don't plant them at mach 20!" The female student screamed.

"No of course not," the very panicked octopus agreed.

"Tulips need a delicate touch!" Yelled another.

"Delicate got it," the octopus teacher patted down the new tulips for replacement of the ones he ruined earlier.

Then suddenly BOOM!

"What was that?" a small blue haired boy asked.

"It sounded like it came from the main school," replied his close green haired friend.

"Was it a firework?" Another student suggested.

"No that seemed too loud," argued another. "Also why would they set off fireworks at this time of year and day?"

"Hum." Korosensei thought deeply, "If I didn't know better that sounded like an explosion."

"Explosion!"

***end***

The class stared at their new classmates as they told them their tale. Then it hit them, "That explosion this morning was you!"

"Yeah," Gokudera spat. "Got a problem with that?" Once again he sent out a death glare that silenced the class as they shook their heads.

Korosensei, feeling a lot more unconformable, stepped back a bit. "Well then will you all please take your seats."

"Right!" Yamamoto hopped over next to the only other baseball guy in the class. "Hey mind if I sit here?"

The boy smiled. "No problem man. I'm Tomohito Sugino by the way," he held out a hand of welcome.

Gladly, Yamamoto accepted it. "Nice to meet you."

Gokudera tried to find a pair of empty seats but there was none in sight, "It's ok Gokudera, you go find your seat and I'll find mine."

"But Tenth as your right hand man I must stay by your side!"

"Gokudera, it's ok we're already in the same class. Isn't that enough?"

"But Tenth!"

After a quick 5 minute pep talk with his boss, Gokudera finally let go of him and let himself be seated away from him. He found himself in between a goth like girl and the class's tough guy. Terasaka grunted at him and he grunted back with much more force. This caused a smile to appear on his face, "Hey name's Terasaka. Ryoma Terasaka.

Gokudera clicked his tongue at his words and turned to his other classmate. Their eyes met and he froze. A chill wrapped round his shoulders as the girl smiled darkly at him. An ominous aura loomed over her. Her skin was pale as snow and her night black hair seemed to float a bit with the unseen breeze. Could she be a… "Ghost!" The boy screamed in terror: "Rin! Pyo! To! Sha! Kai! Jin! Retsu!"

"Are you tiring to exorcise me?" The girl asked as her grin grew wider. "That won't work I'm not a spirit you see." Gokudera sighed heavily in relief. "Or I am Hee hee hee," her laugh sounded like it belonged in a horror show. A cold sweat formed on his forehead and he moved slightly away.

"That's Kirara Hazama. She's a bit creepy but she's ok," said a guy with dreadlocks in front of him. "Name's Taisei Yoshida and this is Takuya Muramatsu," a cheesy grin blonde waved beside him.

"Hey," Gokudera replied cautiously then accidently turned to meet the ghostly girl's creepy grin face. "Ah!" he prayed for the might lord's protection.

Tsuna on the other hand, roamed the very full classroom in search for a vacate seat. "Hey new kid over here," energetically a green haired girl waved and pointed to an empty seat in front of her next to a blue haired boy. With a nod he accepted the seat. "Hi I'm Kaede Kayano," the girl greeted.

"And I'm Nagisa," introduced the boy. He extended his hand. "Hope we can all work together to assassinate Korosensei."

"Uh right." How can he say that with such an innocent smile? He silently screamed but still accepted the boy's hand. Then he turned to his new octopus teacher about to start the lesson. However he soon lost interest and let his head lay flat. He stared outside and spotted the now permanent crescent moon. It happened after we came back from the future. We didn't understand at the time how it came to be but know we know. He turned back to his new octopus teacher and couldn't help but think-What has become of my life?

AN:

Ren: Just to make things completely clear. This does happen after the events of the Future arc even though we know the time capsule events happens way before the future arc. Just needed to twist the time line a bit. Also I'm going to be slow since I'm lazy and have two other projects to work on. Till next time bye.

Yen: Oh by the way Ren, don't for get Tsuna calls Gokudera 'Gokudera-kun'.

Ren: (Internally screaming) Why must you make things more difficult for me! Ok people I will do the whole san, kun and whatever thing with the hitman reborn characters only since there is no English dub to copy and so people are probably more used to it. I'm not use to this whole writing in Japanese thing since I don't really get it. I hate doing this but to stay close to the character I have no choice. That and Yen really want's me to do it. This is going to annoy the heck out of me since there are so many different names they call each other. It's so confusing! So I will go half way. If there is a direct English translation I will use it. For example dame Tsuna is no good Tsuna and nii chan as big brother. This is just to make it easier for me became I don't get Japanese . However I will try and use their unusual sayings like Yamamoto's 'ma ma' if I can remember any of them. Other than that I will be using the English side of Assassination Classroom since there is an English dub I can follow speech wise. So no Kun or chan for them or I will go mad! So just deal with it Damn it!

Yen: (laughs in the background)

Ren: (Groans) I'm really going to regret this aren't I?

Yen: don't worry, Ren, you have me to help you.

Ren: Whatever. Till next time.

Yen: Ciao!