Disclaimer: I don't own KHR

A/n: I Thanks DarkDeatheez for Beta'd

Reborn never liked Language and would never will. All he ever did was sleep in class when the teacher explained how important language was and how important connect it to the people and more nonsensical words. He could care less about language. He never once aced a Language test, even though he always passes with an A. In his opinion, his grammar, spelling and punctuation was in perfect form. He knew over ten language and had the ability to communicate with animals (however absurd some people thought that was, one would never have the guts to tell that to Reborn).

It always puzzled him as to how he had never once aced any Language test. It was no big deal for other people. Although an A was still an A, Reborn was a perfectionist, less than perfect was unacceptable. Reborn was the sort of man to aim for the best, never any less.

With furrowed brows, he went to ask Timoteo, the Language Teacher about the question which he had lost a full ten points on. The answer…

"You need to understand Romeo's feelings!"

What? How could he understand the character's feelings? The only one who knew Romeo's feelings best was the author, William Shakespeare, the creator of the character. However, Shakespeare was already buried six feet under long before he had came into existence. If it was Mathematics, his most excelling subject, he would be able to refute the teacher with formulas and analytical thinking. But this was language, it was absurd and abstract in Reborn's opinion. Everyone's opinion differed, whether slightly, greatly or immensely.

Finally, he came to a conclusion. It seemed, his answer didn't appeal to Timoteo enough. Nothing he would do about it. He hated language in the first place because there was no certain and decisive answer. Answers always varied from person to person and their mindset.

That was what he though about language until he met Sawada Tsunayoshi, a boy who liked Language class. He was weird in his own right, peaking Reborn's interest. Reborn had become a tutor for the brunet because his grades were poor, worse than the average student. Simply put, Sawada Tsunayoshi was useless at all subjects aside from Language. Normally, he wouldn't help tutor anyone but Sawada Nana had asked him. Of course, being a gentleman, he had accepted her request. The reward certainly was not bad. He enjoyed eating Nana's cooking which would compete and win easily against many five-star chefs.

"You're really Dame-Tsuna. How can you not be interested in mathematics?" Reborn asked.

Tsuna sighed dejectedly before replying back. "More than half of the population on earth hates mathematics, Reborn."

Reborn flicked Tsuna's head hard. No one could insult his favorite subject and get away with it easily. "Then people don't know what good of a thing they missed."

Tsuna looked at him in disbelief, "How could you like mathematics, Reborn?"

Reborn glanced at the brunet before pondering over the question for a moment. As long as he could remember, he had always liked mathematics. In honesty, it was fun for him. Everything in mathematics was decisive and certain; the answer would always be the same. Everything was logical. As long he applied the right formula and look at problem thoroughly, mathematics never had any hard curves or obstacles that was hard to understand. There was a certain satisfaction when you come across a difficult problem and were able to conquer it.

"It's fun." Reborn finally said.

He was prepared to see his student to look at him like the strangest being in the universe. Beside the Arcobaleno group, Reborn never told anyone about how obsessed he was with math. He already had a mathematics degree under his alias, Boreen.

However, Tsuna smiled at him, natural and genuine, accepting of this side of him. "I have never met anyone who had said math' is fun. You're amazing, you know?"

Reborn turned around at hearing those words. He needed some form of distraction. A sudden desire sparked through his being, to take the brunet then and there. However, he resisted with every fiber of his being to hold back the urge of pouncing on Tsuna. Tsuna was simply that adorable.

Picking up Tsuna's test, Reborn saw a seventy on the Language test. It was same exam he had previously taken. There were grammar mistakes, spelling errors and other blunders that caused point deduction, but Tsuna had gotten full points at where Reborn failed to satisfy Timoteo. Reborn continued reading through the paper with interest.

"How come you're lousy at everything beside Language, Tsuna?"

"Eh? It's fun... I guess?" Tsuna answered.

"I don't understand it." Reborn said

Tsuna looked at disbelief. Begin to explaining things to Reborn so his tutor and friend could enjoy language like he do "Well there is-"

And Reborn was sleeping. Sleeping, as in resting with his eyes closed and ignorant to the rest of the world. Reborn felt no need to listen to Tsuna's explanation about how Reborn should enjoy Language.

"Are you already finished?" Reborn yawned, awakening after Tsuna's speech.

A tick mark was apparent on Tsuna's head, expressing the brunet's dislike towards Reborn's action of ignoring his words. The brunet tried to growl at the raven but huffed in misfortune after realizing it looked more like a pout than a scowl.

"I can't believe you fall sleep!" Tsuna whined.

"I don't feel interested." Reborn lazily replied.

"Then I will teach you! So you can enjoy it too!" Tsuna said, eyes filled with determination.

"Oh interesting. Then I will teach you beauty of math, Tsuna." Reborn smirked. Tsuna flushed bright red at the close proximity of their faces. Reborn smirked in return. Tutoring will definitely be much more interesting starting from now on.

A/n : Next chap : About Primo being annoying Father in law for Reborn.

"So Reborn, The Greatest Hitman in world. How do you meet My beloved descendant?" Primo asked

This fanfic contains combination of one shoot. I would like to do future. So it's not end yet. In new chapter, It'll new one shoot

Sorry English's not my first language.