I starred this story because there is so many stories about Harry Potter into KHR universe but almost none about Tsuna and gang into Harry Potter universe. So that's how this was born. Hope you all enjoy it and review, fav and follow. If I get sufficient feedback I'll update early too. But my other story is my main one till you all want to change it.

This is a trial chapter. If you all like it I'll continue. If you don't I will not. As simple as that.

Summary: After the arcabaleno curse was broken and Tsuna Sawada crowned as the Tenth boss of Vangola family after finally turning thirteen. It just so happen a Hogwarts letter arrived for him on his thirteen birthday. How will the mafia survive magic? Moreover, how will the magic world survive Tsuna worshipping mafia? Not to mention Tsuna keeps attracting strange beings.

Disclaimer: Don't own it. Never will, boy but I wish.

I know Hogwarts's starts at eleven years, let's just pretend here that it starts at thirteen years of age.

The day was finally here. He never thought he'll live to see it. With all that had happened to him, Tsuna Sawada had never thought to think he would live to see his thirteenth birthday.

In his past two years, he had fought for his friends and this world and even if at first it had been totally unacceptable to him, he had adapted. And come to think of it he'd come to enjoy it too. He loved this life.

That was the whole reason he had accepted the position of the Vangola Decimo, the tenth head of the family. Short of his death, nothing could replace him from being the family head. Nono had finally retired, the arcabaleno who had finally been freed of their curse were still children for some reason. Bermuda, even after all that had taken over the Vendice.

Gokudera-kun had finally become the official right-hand man of the tenth boss and Yamamoto was still happy go lucky. Even Varia had attended the succession ceremony, and just out if pure coincidence no one had gotten hurt at he fight which had broken out.

It had been a week since then and now it was his birthday, he would officially be turning thirteen now. He would finally entering into his teens. Even his father had taken a leave on his birthday to spend the day with him. He was happy, contented even.

In his room he was eagerly waiting for tomorrow, perhaps for the first time since Reborn had shown up. He was sprawling on his bed, feeling extremely lazy. Deep in thoughts he only turned to face the door when it opened with a creak.

"Tsu-kun, are you busy?"

He blinked at his mother's form at his door. His mother seldom, if ever entered his room. Perhaps she understood that he was growing up or perhaps too busy with Futta and other children, but he felt like he hardly talked to his mother anymore.

But now was a good time to talk things out. Him father finally had taken to explain everything to his mother the day before the inheritance ceremony. It looked like his mother had finally come around.

"It's alright. I'm not busy at all"

He straighten himself in his bed and faced the door fully. He wanted to see his mother fully. It had been quite a while since he had talked to her alone. Just them two. Nana walked toward his bed, closed the door before sitting down.

"Tsu-kun, do you believe in magic?"

Whatever he had thought would come out of her mind this was not it at all. He had thought she would beg him to be careful, perhaps to leave mafia even or to scold him for not telling her the truth earlier. But magic? This was a little out of his expert.

The thought was not quite unbelievable after all that he had gone through it was not hard to believe in magic. Mukuro produced illusions that were real for god's sake.

"After all I've seen, I'll have to say yes"

He answered her. Her expression changed, a pained look taking over her face for a second before her cheerful look coming back. Maybe she had heard all that he had gone through from his father? Or as much as he knew. There were something's which were not meant to be known at all.

"Ah, It's good. You see Tsu-kun, mama is a part of a magic family too but doesn't have any magic powers. But you seems to have inherited them from my family. See here's your letter to attending a magic school called Hogwarts"

His whole frame froze in shock then he started to laugh. His father was in mafia and now his mother wanted him to believe she was from a magic family? As in wizard. Just how fucked up was his life? And what's more, there was even a magic school he had to attend. He wanted to sleep and never wake up again.

"I think it will be good idea for the Vangola boss to make some powerful magic allies Tsuna. Besides you've already been enrolled, or would you mind next year training without a break"

He did not know when reborn arrived and he did not know why he was here even if he was in Italy yesterday. He did not even know what this entitled here but if he'd learned anything it was that arguing with arcabaleno and especially reborn only worked as long as his life was not in consideration.

Bedsides he did not want to disappoint his mother who had such a hopeful look on her face.

"Do not reveal your identity to anyone"

That sealed his fate.

...

Tsuna had one week to prepare for the unavoidable trip to Daigon Ally, which he had been told was one of the best places for shopping before being shipped off to Hogwarts.

Reborn had advised, more like beaten into him to keep his allegiance with Vangola and it's associates a secret. Apparently Vangola and Vendice were legendary even in the Magic world and Primo was a great magician whome almost no one had seen but all had heard of. As such, Vangola had a lot of influence in the magic council.

According to his mother, whom was a Black bit a Squib(a non-magic person born to magical parents) and thus her mother had taken her away from the world for protection Vangola was an considered to be the ruling party in the magic world. Also the biggest neutral ground between dark magic and light magic, not that he knew what the difference was.

In short all he got was that his mother was from one of the most important and old families in the magic world and his father was like belonging to the ruling family there. He had a bad feeling about it, as in life changing bad and it's always bad for him.

His only saving grace was that none of his friends had been there. Gokudera-kun had gone back to Italy, Yamamoto following in the tow, apparently he wanted to meet Squalo. Hibari-san was busy with Nanimori High and biting defaulters to death. Some of them had escaped him and he had spend the whole week looking for them. Lambo was busy with I-Pin who had gone to visit her master. Chrome was where Mukuro was and well Mukuro had an unhealthy obsession with him. More like his body.

After all he had been through it was really difficult to warp his mind around wooden sticks called wands for performing magic after all he'd seen, but he'll get used to it. He flied with flames after all.

His mother had yet to show him a proof of his lineage but had promised him that he'll see soon. A visit to her family home, which she had inherited after most of her family had been killed or removed and Las of her family had been taken to Azkaban (wizard world's Vendice which had him freaking) and her as the last family remaining becoming a family head.

In short her mother was his ward till he comes of age at sixteen and inherited it all. And she had ade arrangements to visit her ancestral home. So there they were going.

The Black mansion.

Which was much to his confusion was a building block. A paper was trusted into his face by reborn who had accompanied his mother and him. The small sun was sitting on his shoulder Leon who had changed into a gun and aiming at a man who had just appeared from thin air.

"Tsuna read the address and it'll burn afterwards. Remember the address"

Reborn commanded all the while his gun targeted at the lanky man who had appeared. Tsuna not wanting to disobey reborn quickly red the address.

It read-12 Grimmauld Place.

The paper busted into flames just as he finished reading. The man in front of them raised his hands in surrender as reborn did not waver.

"Remus-san?"

His mom called out to the man who had his hair all over the place. The clothes looked like they had seen better days and even the person itself looked worn out.

"Nana? Is that really you? Nana Black?"

The person called out. Reborn jumped from his shoulder to approach the man in front of him. By now Tsuna had learned not to question anything weird. The man who felt not quite human approached him with his mother.

"This is my son Tsuna. Tsu-kun, this is Remus-san, a friend of my brother Sirius. He's here to accompany is to the Daigon Ally for our first trip for supplies"

The not-quite human approached him, his steps not really careful as if feeling that Tsuna was no danger at all. Reborn having analysed the area once again took the place at his shoulder. The man gave Reborn a one over before putting up his guard. Looks like he recognised Reborn as a threat.

"Nice to meet you, son of Nana. Come this way"

He lead them into the apartment block and stopped in-between the numbers 11 and 13. He could not see anything there but he felt as if there was something there.

Before his very eyes a door appeared with number 12 on it. If he had been the Tsuna of two years ago he would have cried or even broken down, but after all he'd been through it looked like not much at all.

If that Remus person expected them to jump with surprise he was mistaken. For Tsuna this was an everyday thing. He had taken Mukuro and Chrome in after all and Mammon was a frequent visitor to him.

"You don't seem surprised at all. Usually people are at least surprised at this"

The not-quite human explained as the door opened and let them into the big corridor. Reborn jumped down and moved to god knows where. He had a feeling Reborn was making connecting tunnels and checking the place out.

"We'll I've seen a lot so I can't say I'm really surprised at all"

He called out to no quite human who only looked at him in amusement as if humouring him. Nana moved into the kitchens.

"Never thought I would be back here again"

She called as if recalling her childhood. Tsuna felt something not quite right with the place. It somehow get wrong, just as how Mukuro felt before he had reformed. Somewhat. But this was a place not a person filled with sadness and loneliness. But he had a feeling it was about to change though.

"I'll let you settle you into your rooms. You're luggage for the next two weeks is already there. Rest today, we'll go shopping tomorrow for your supplies"

For now he wanted to rest.

This is a side project for me majorly because I'm bored. My other story would not be ignored. If you guys want this to be more readily updated them give me nice feedback.