Chapter 1

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"It's a training trip," Reborn announced, and with a smugly evil smirk, he had added, "as a boss, you should be capable of handling problems on you own."

That was how the newly-made Vongola Decimo found himself standing before the classroom of 3-E, Kunugigaoka Junior High School, with nothing except his mittens, his rings, and a small box of Dying Will Pills.

Alone and without Guardians.

"A-ano…"

Shiota Nagisa blinked, azure eyes meeting those of the speaker. Wide, caramel eyes stared back, uncertain yet sincere in a way that Nagisa hadn't been on the receiving end for a very long time, not since he landed in Class E.

Pretty, Nagisa noted idly.

The seconds started to stretch, and with a slight hurry to save himself from further embarrassment, Nagisa answered with a polite smile. "May I help you?"

The student fidgeted, breaking the eye contact. "D-do you know the way to K-Kunugigaoka Junior High School? I'm a transfer student."

That explained it. Nagisa had been surprised when a fellow student of Kunugigaoka approached him (as the other's uniform indicated), when the general treatment towards the students in Class E was of disdain, when his own so-called friends back in elementary school had ignored or avoided him, pretending that he did not exist, pretending that they had nothing to do with him.

Nagisa tried not to mind it too much. He'd only had one year left, anyway. But that didn't mean that it wouldn't hurt, because—

(—"Hey, isn't it that class?"

"Look how pathetic they are."

"I heard that their classroom is in ruins, can you believe it?"

"Haha! Fitting for a bunch of hopeless students with no future.")

But that was before their new teacher came, before that golden opportunity was brought to their doorstep. Karasuma-san had quoted a reward of 10 billion yen, but to them, it was less of the money but more of the chance to be acknowledged by the world as heroes.

Heroes, they had tasted the word in their mouth. If they could do it—if they could kill that creature—then it would be enough proof that they are worthy.

Nagisa tucked those thoughts in seamlessly.

"That way," he replied instead, a finger pointed towards the main school building standing proudly in the middle of the sleepy city.

"But you're walking in the opposite direction," the other person said, tilting his head slightly, the mass of gravity-defying hair following the momentum.

"I'm in Class E," Nagisa explained, his smile slipping just a little.

The transfer student only gave him a hesitant smile in return.

"So we're classmates, ain't we?"

"Nice to meet you, I'm Yoshi Tsuna. Please take care for me."

After chalking his name neatly on the blackboard, the aforementioned boy bowed to the class, his frame still jittery from nervousness. Well, Reborn had already taught him never to use his real name in any case, and by now, creating a fake one was something he needed not to be told. Tsuna really hated lying to others, but Reborn had mentioned an assassination request, and this kind of requests were usually shady.

(His mentor had also muttered something about repaying a favour afterwards, but Tsuna shuddered at the implication of the Reborn owing any sort of favour, so he just pretended that he heard nothing.)

With the mafia, he had been Vongola Decimo and/or Neo-Primo most of the times, and sometimes Cielo or other language variation, but there were civilians involved in this case, and Tsuna didn't want to cause trouble for them. The mafia was unforgiving, even just knowing the name of the current leader of the most powerful famiglia could endanger.

Three years with Reborn taught him as much.

However, even Sawada Tsunayoshi, the young Vongola boss equipped with their famed Hyper Intuition, did not expect a bright yellow octopus-like creature in the classroom, clad in an academic dress and completed with a graduation hat. This… octopus was also looking through a magnifying glass examining his hair, of all things.

Well, his fluffy, never-able-to-lie-down-for-so-much-of-a-split-second hair, but still!

Not for the first time, Tsuna wished for some normalcy in his life. (It was a futile wish.)

"E-Excuse me, but who are you?"

The octopus had a permanent grin on his face which disturbingly reminded Tsuna of Reborn's similarly permanent smirk. Briefly, he wondered if the two had actually known each other.

… There was also a voice that sounded suspiciously like Hayato in his mind screaming, "UMA!" Tsuna decided to ignore it for the sake for his sanity.

"Nurufufufu, I'm the homeroom teacher of 3-E," the yellow octopus replied, his grin not even dropping.

And Tsuna, Tsuna could only stare. For a moment, his mind was absolutely blank. Then—

Oh my god—that laugh is like Mukuro's. Please tell me he is not a mix of Reborn and Mukuro, because that'll be— Nope nope nope not going down that train of thought.

Outwardly, he had managed an automatic smile, polite and charismatic like the way Reborn had drilled into him countless times.

Inwardly, he quickly burned some mentally conjured incense, all the while suppressing the intense urge to just scream or cry, preferably both, because, what have I done to deserve this?

"Stand at attention!"

Once the command was given, every single student stood up, guns and rifles trained at the yellow creature.

Tsuna was trying very hard to comprehend everything, and even though his intuition assured him that it would be alright, holding his ground and not fleeing at the slightest chance was a difficult thing to do.

"Bow!"

And instantly, chaos was unleashed at guns were fired and bullets flew across the room. After a few moments of panicking, the long-since-drilled procedure of analysing the situation resurfaced, and Tsuna opened a hesitant eye to access the current circumstance. The bullets looked harmless, not even making a single damage on the walls or blackboard which some were being shot at, even though the gun looked real enough.

(Tsuna ignored the whisper of his intuition telling him they were real guns, just loaded with pellets instead of bullets. All for the sake of his sanity, of course.)

What amazed him, was that the yellow octopus, or Koro-sensei, as he was being referred to, was moving at an incredibly high speed which even Tsuna, after being trained for so long, could barely follow.

Even while dodging the mass of bullets, his new sensei was calmly marking attendance.

And later, after roll call, Tsuna was pulled aside from class, by none other than who the other students called 'Karasuma-san', an agent from Japan's Ministry of Defense.

Tsuna did not need his Hyper Intuition to tell him that this man was dangerous, not just some wannabe soldier. And he could pull evidence from the fact that the Vongola Guardians had barely brushed past his shoulders several times where assassination attempts were sent from all across the world to Japan whenever Tsuna was in Namimori, or some other parts of the country.

The man did nothing to cushion the news, instead, he had cut straight to the point, telling him about the creature being the one which had destroyed 70% of the moon, (Tsuna wondered why he hadn't known about the moon yet, maybe due to the fact that Reborn was an evil, sadistic tor-, he meant, tutor, and that this tutor had literally dumped him in some underground place with nothing but a torchlight and multi-functional knife and telling him to make it out alive.) and that the creature had to be killed before next year March, before he destroyed the Earth.

So Tsuna took the knife which felt like rubber, a pistol and bullets of the same rubbery material, with his brain working overdrive to take in all the information.

When he eventually did, he compared it to the Future Conflict and the Arcobaleno Battles, and he found it much, much easier to accept.

Fixed some minor mistakes!

Guess who re-watched assassination classroom ;w;