AN: Hello people. It's been a long, long time. Yes, I know what you all must be thinking, 'Where the hell have you been?' and 'Why have you started a new story altogether?' I would like to say that the story, 'Fairy Tail's Resident Phoenix Slayer' will continue. I have not dropped it. It's just that since I have started University in September, I am not getting any time to complete it. I would really want to apologize to all those who eagerly await the next chapter of that story. I promise it will be there.

I just got an idea of this story out of the blue and thought 'oh... I think this will be fun.' and wrote it. I couldn't decide on a title of this story so right now I have just settled with 'A Mafiosi in Hogwarts? Well Damn!' I know, not exactly a catchy name but what can I do? What you guys can do is send me a title name on PM. Send it to me and I will decide on the best one. When I put the new title I will also acknowledge the person who sent it to me.

So I will just give a brief scenario about this story. It is an AU. It is an AU to KHR, Harry Potter and the Real World, the world where you and I live. That is something I'm sure y'all will notice. Still if any questions, PM or write it down in the comments.

1. Just assume that the Vongola and by extension the Mafia is much older. So like there are a few more greats between Tsuna and Giotto.

2. After handing control of the Vongola to Ricardo, Vongola Secondo. Giotto went to Japan with his guardians and formed the Sawada Family. With Giotto changing his name to Ieyasu Sawada.

3. The Sawada Family under Giotto had done something to gain approval of the Emperor of Japan and were given the title of one of the Great Noble Families of Japan.

4. Tsuna's actual Grandfather, i.e. Iemitsu's father, Ietsuna is featured in this story. So like, he's alive and everything.

5. I have got in characters and families from other mangas and animes and even a few movies. Good luck in recognizing them throughout the story. (Please don't burn me for doing this. I always wanted to do this. SHOW ME SOME MERCY, SARGE!)

6. This story is set in the Marauders Era.

7. This story is a Tsuna x OC

8. There are no bashings in this story... At least not yet.

9. "Language" is English

"Language" is Italian

"Language" is Japanese

10. All Flashbacks will be narrated in Italics font. But the speech pattern will be as shown above

Lastly, thank you for reading my rant. And please enjoy the story. Oh BTW, I don't own Harry Potter, KHR or its Characters. They are too cool to be owned by someone as insignificant as me.

Chapter 1

Vongola Private Jet. En-route to London Heathrow from Tokyo Narita. Somewhere above Kazakhstan. Night – time.

In a black colored private jet, some 35,000 feet above sea level, a brunette is sitting in one of the luxurious armchairs of the plane. Held in his hand is a black file, which had the words CLASSIFIED and TOP SECRET, with the emblems of the Sawada, Vongola and Yotsuba Families, stamped on it.

The name of this youth is Tsunayoshi Sawada, also called Tsuna by his friends and family. He is the 15-year-old heir to the Great Noble Family of Sawada, one of the Five Great Noble Families of Magical Japan, and the Vongola Crime Family of Italy. He is also one of the candidates of the succession of the Yotsuba Family, one of the Ten Master Clans of Magical Japan.

Tsuna has an aristocratic face, which could easily be seen as handsome. He has fluffy brown hair, which spiked towards different directions, but with a bit of hair gel was made to look much neater. He has a sharp chin and a sharp nose, which further defined his aristocratic looks. His thin lips were set in a straight line. His eyes were soft, brown and something else, which made him look much more mature than your average 16-year-old.

In front of Tsuna, another toddler was sleeping with his eyes open. The toddler was dressed in a suit, with a fedora on the head and a green colored chameleon perched on the fedora. The name of this toddler is Reborn, The World's Greatest Hitman, Former Sun Arcobaleno and the Consigliere or Internal Advisor to Vongola the Xth and Godfather to Tsuna.

With a sigh, Tsuna closed the file and thought, 'How did I get dragged into this? Oh yeah…'

Flashback

"I'm home!" Tsuna called once he entered through the doorway of his house.

"Welcome back, Young Master, how was your day today?" Ayame, the head maid of the Sawada Household asked, after bowing her head in respect to the Young Master and Heir of the house.

"Oh, hello there Ayame. My day was good, thank you. Do you know where everyone is?" Tsuna responded.

"Your mother, Lady Nana and your grandmother, Lady Aguri have, at the request of Young Master Lambo, Young Master Futa, and Young Mistress I-Pin, taken them to watch a movie. Reborn-sama, Lal-sama, and Basil-sama have accompanied them as bodyguards. Tatsuya-sama is still at the FLT headquarters and Miyuki-sama has accompanied him. All of them should be back by dinnertime. Lastly, your grandfather, Lord Ietsuna has requested you to meet him in his office after you freshen up." Ayame reported.

"Very well. Please inform grandfather that I will be there in 15-20 minutes after I freshen up and wear some more presentable clothing." Tsuna requested, but both of them knew it was more of an order, which just looked like a request.

"Of course. I shall do it at once." Ayame replied, before once again dipping her head in a short bow and turning on her heels towards his grandfather's office to inform him.

Seeing that the conversation was over, Tsuna turned towards the opposite direction to go to his room.

After freshening up and changing clothes, Tsuna made his way to his grandfather's office. Once he reached, he politely knocked at the door. A gruff "come in" told him that his grandfather was expecting him. So he opened the door and let himself in.

Ietsuna's POV

Ietsuna Sawada was, simply put, an intimidating man to look at. Even at the age of 77, he still had the body and strength of a man in his mid-30s or younger.

The Ninth Head of the Great Noble Family of Sawada had lost his right eye, early on in his youth, when he was posted in the Indochina region of Asia, during World War 2. He lost it to a wizard from Britain, against whom he had been locked in a ferocious duel with. Because the skill level of both men was of such high quality, both men ended in a stalemate. With Ietsuna losing his right eye and the British Wizard having a large and deep gash on his upper body that extended from his left shoulder to his right hip. Both men easily knew that their wounds would never completely heal. Even though they were enemies, both men had started to hold each other in high respect. With a nod to each other, both men retreated back to their camps for medical attention.

Both men never saw each other again.

Even when Ietsuna was part of one of the magical assault squadron sent from Japan to help the American, British and other European Wizards to finally lay siege on Dark Wizard Gellert Grindelwald's Headquarters, Nürmengard. While the Non-magical forces dealt with Adolf Hitler in Berlin. Both men never saw each other again.

-Linebreak-

Ietsuna Sawada was brought out of his reverie by his grandson and heir bowing towards him and looking straight into his eyes. Well, in this case, it would be eye, since the right eye socket was covered by an eye-patch.

"Reminiscing again, Grandpa?" Tsuna asked with a mischievous smirk.

"Reminiscing about the time I asked your Grandma out on a date for the first time," Ietsuna replied cheekily with a large smile on his face.

"Alright. Dangerous territory. Not gonna go there." Tsuna replied with his hands up in a motion of surrender and a flustered expression.

"Awww… Come on Tsu-chan you know you like hearing about the old school romance of your grandparents and parents. No need to be shy about it." Ietsuna teased his 'adorably-cute-grandson-when-flustered'.

"No. I don't. Plus, I'm pretty sure you have called me for something important. We already tease and take friendly jabs at each other on the dinner table anyway." Tsuna replied, with a straight voice.

"Yes. I have called you for something important." Ietsuna said seriously, not before mumbling something about 'innocent grandchildren getting too serious about everything'.

"What is it?" Tsuna asked, straightening up at the serious voice of his grandfather, silently praying it was not another family offering their daughter to marry him. He was so done with that bullshit.

"A mission. Authorized by me i.e. Your Grandfather, your Maternal Aunt, Maya Yotsuba and your Paternal Great-Uncle, Timoteo di Vongola." Ietsuna said while sliding him a black folder.

Tsuna quickly skimmed through the contents of the folder before blurting out, "I'll have to go to Britain?"

"Yes," Ietsuna replied.

"How long is this mission supposed to be?" Tsuna asked.

"A year and a half. Probably two." Ietsuna replied promptly.

"What about my academics?" Tsuna asked uneasily.

"We have already asked the Departments of Education and International Relations of the Japanese Ministry of Magic to contact their British counterparts to quickly move forward a Transfer Request. From Mahoutokoro School of Magic to Hogwarts School of Witchcraft and Wizardry for two years. I suppose all of your documents should arrive in three days." Ietsuna explained.

"So I'll have to give my NEWTS at Hogwarts then?" Tsuna asked again.

"Yes. But if you want to, you can still complete you NEWTS in Japan, considering over here it is taken when a student is 18 years of age. I wouldn't be worried about it. Your OWL scores were quite impressive. Well except Divination. Considering they gave you an Acceptable just for appearing at the exams." Ietsuna explained again.

"My friends…" Tsuna started.

"Reborn will send a copy of the folder you are holding to your Guardians. Your parents i.e. Iemitsu and Nana, your cousin Tatsuya, and your Ryo-Sensei already know of your mission. As for your other friends, we will just cook up an excuse, don't worry. Timoteo is going to send a man too. It is not Reborn though since that guy has got bigger fish to fry than this. Any more questions?" Ietsuna finished.

"When do I leave?" Tsuna finally asked after a few moments of thinking over.

"You will have a Vongola Private Jet waiting for you at Tokyo's Narita Airport. Your flight leaves at 0000 hours on 20 August, 20XX. You'll be flying directly from Narita, Tokyo to Heathrow, London. One of the Vongola's people will brief you about the rest of the details in your hotel room." Ietsuna replied.

"Very well."

"Now then, Let's have dinner. I think everyone has arrived and are probably waiting for us."

"Of course, grandfather. Let's go."

Flashback End

'Yeah, that's how it happened. Though the party that was held a few days later was really fun and chaotic.' Tsuna thought fondly. All of his friends and family had come. He surely did find his Guardian's antics hilarious.

"Oh well, guess I'll take one more look at the file before I catch a few Z's," Tsuna mumbled to himself and opened the file, once again regretting doing so.

For the Recipient Tsunayoshi Sawada's eyes only

By order of Ietsuna Sawada IX, Timoteo di Vongola IX, and Maya Yotsuba

Mission Type: Espionage, Search and Destroy

Mission Rating: Crimson, Omega

License to Kill: Granted

Mission Details: You are to go as a transfer student to Hogwarts School of Witchcraft and Wizardry and ascertain the level of threat, Tom Marvolo Riddle a.k.a. Lord Voldemort and his followers the 'Death Eaters' pose to the general population of Great Britain and all Family Assets present in the same country. You are also to determine whether the conflict will spill out of British soil. Observe and take action at your own discretion. A weekly report is expected. If not possible, one report every two weeks shall suffice.

Mission Status: Active

This is an official mission. As such this order may be presented to the Vindice as Proof of Action.

"Fuck." That was the only word that left Tsuna's mouth when he re-read the mission order for perhaps the hundredth time.

"Fuck indeed, Lazy-Tsuna." Came the high-pitched voice of the toddler sitting in front of him.

"I thought you were sleeping," Tsuna said, completely used to his Godfather's antics.

"I was. Your eloquent words woke me up." Reborn replied.

"Sorry."

"Don't worry about it. Now sleep, my dear Godson. Right now, we are only halfway through Kazakhstan and we still have a lot of distance to cover. I'll wake you up when we are halfway through Germany; to give you time to freshen up. A Boss must be well rested." Reborn said.

"Si, Padrino," Tsuna said and closed his eyes. A while later light snores started sounding from him.

Satisfied, Reborn dimmed the cabin lights of the jet, pulled down his fedora and once again went back to sleep.

Omake

All of Tsuna's friends and family had quite different reactions when they were told of Tsuna's upcoming departure.

Tsuna's Guardians, for example, who knew of the mission, had the following reaction.

Hayato Gokudera, Tsuna's right-hand man, Storm Guardian and best friend, was contemplating whether or not should he try to strangle Tsuna's Grandfather for sending his beloved Boss and best friend for such a dangerous mission, with no immediate backup or immediate extraction, if things go south. He was being calmed by a smiling Takeshi Yamamoto. "Tsuna! If you have any problems please call your loyal Right – Hand man. If all methods fail, even telepathy will work." "Sure Hayato. I'll keep that in mind."

Takeshi Yamamoto, Tsuna's left-hand man, Rain Guardian, and best friend was trying to calm Hayato down with a smile and a laugh, and stop him from strangling his boss's grandfather. Though even he had some reservations about it and was worried about his Boss and best friend. However, he knew Tsuna could easily manage a mission like this. "Ha ha ha Tsuna, exactly what Hayato said. Hook us up if there are any problems." "Damn straight I will."

Ryohei Sasagawa, Tsuna's Sun Guardian and honorary big brother, kept on yelling how EXTREME the mission was. He wished Tsuna the best of luck for his mission and told Tsuna to call any of his Guardians at any time in case he needed help. "Your mission sounds EXTREME Sawada!" "It is. Looks like I'll be causing chaos in Britain now."

Kyouya Hibari, Tsuna's Cloud Guardian, and cousin, simply told him, "Carnivore, make sure your fangs don't dull in that annoying, herbivorous, British stick – waving school. Or else, I'll bite you to death." "Sir, Yes Sir." Tsuna didn't doubt his vicious cousins' claim for one second.

Mukuro Rokudo and Chrome Dokuro, Tsuna's Mist Guardians, also wished him luck in their own way. Chrome told him "Good luck, Bossu" and kissed him on the cheeks while Mukuro told him "Kufufufufu, don't die or else I wouldn't be able to possess your body, Tsunayoshi-kun." "Thank you, Chrome." "And you piss-off, ya Pineapple Pervert."

Of course, Mukuro's statement just started a new wave of chaos in Tsuna's house with all of his guardians (except Chrome. God Bless that girl.) shouting and yelling and fighting over each other. A scene Tsuna was so used to that he didn't even bat an eyelash at their antics and just calmly drank his hot chocolate.

His little siblings, on the other hand, Lambo, Futa, and I-Pin just started bawling on why was their Tsuna-nii leaving for such a long-term mission and when would he come back. Tsuna promised to write to them every week and try to visit during the Christmas holidays. "Waaahhh! Tsuna-nii, why are you going for so long? Lambo-sama will miss you. So will Futa and Tail Head." "He is right, Tsuna-nii *Sniff*" "There, there. Don't worry, I will write to you guys every week ok? And Lambo, stop calling I-Pin Tail Head. That is very rude. I will also try to visit for Christmas ok?"

Even Tsuna's perverted mentor, Ryo Saeba, managed to come, though Tsuna was a 100% sure, he got rejected by at least 50 women he may have flirted with on the way to his house. When Tsuna asked him, "So, Ryo – Sensei, how many women rejected you on the way over here?" Ryo proudly said "75 women. But I shall never give up. It is my dream to sleep with all the women in the world," while giving Tsuna a thumbs-up. This just made Tsuna and his two fellow cohorts, Tatsuya Shiba, Tsuna's cousin and Masaki Ichijou, the Scion of the Ichijou Clan, facepalm at their mentor's antics.

The rest of his immediate and extended family that included his mother, grandmother, cousins, aunt's, uncles and various other people told him to be careful at all times in their own way.

At the end of the day though, Tsuna couldn't ask for a more chaotic bunch of families and friends.

AN: So there you have it, folks. The first chapter of my new story. I know it seems a bit rushed, please forgive me. Please write down in the comments section your thoughts and ideas on what you feel about it. It will help a poor soul like me know that there are people who are reading it and want to see it become better. Also, I should remind y'all that it has been a long time since I have written a fanfic, so please go easy on me for a while, because I'm still trying to find my bearings. Buut on that note, I love you guys and once again thanks for reading.