Disclaimer: I do not own KHR...

Summary: All Natsuyume wants is to be accepted by the entire family and support her love ones in everything they do. On the other hand, Fate has something in store for her which she and her family didn't expect at all.

The Vongola's Black Sheep

Prologue:

This story takes place after the Curse of the Rainbow Arc. During the Representative Battle of the Rainbow, it was stated that only one arcobaleno will be free from its curse if and only if that one arcobaleno won the representative battle. For some reasons unknown, it seems like all of the arcobalenos are free from its curse and now...

They are all in their adult forms...

Now that the Representative Battle of the Rainbow is over and all of the arcobalenos are free from their curse...

It's time to PARTY-PARTY!

"Y-Y-You're Reborn!" Tsuna said surprised as he points his index finger to Reborn.

*smirks* "That's right, Dame-Tsuna. So stop imagining those stupid appearances on me" Reborn said as he cocks his green gun (a.k.a. Leon)

"HHHIIIIEEEE! Alright! Alright! Reborn! Just don't shoot!" Tsuna said as he runs off somewhere safe.

For some reasons unknown, The party was held on Tsuna's house. Nana, Tsuna's mother, made a feast in which she is good at.

All of the arcobalenos, Tsuna's guardians, Bianchi, Dino, Fuuta, I-pin, Kyoko, Haru, Chrome, Ken, Chikusa, M.M, Shoichi, Spanner, Byakuran and the real six funeral wreaths, Iemitsu and the CEDEF members, Gamma, Nosaru, Tazaru, the Shimon Family, and even the Varia are in the party. More like, they are all present in Tsuna's House.

How all of them fitted in the house and how the house managed to survived for long with all those "people", Well, that's already a miracle.

Lambo, I-pin, and Fuuta are playing together.

Lussuria, Luce, Bianchi, Kyoko, Haru and Yuni are having some girl talk.

Mammon and M.M are having some "money talk".

Julie is trying to flirt with Chrome while Chrome is doing her best to stay away from Julie.

Mukuro and Adelheid are trying to kill Julie for flirting with Chrome.

Hibari is trying to beat Dino to death while Dino is doing his best to survive.

Gokudera is temporarily staying in Tsuna's bedroom because he saw his sister's face up close.

Shitt P. is stalking Gokudera.

Yamamoto and Squalo are having some "mock sword fight" as a piece of entertainment (?).

Verde, Shoichi, and Spanner are having some conversations in which only people with high IQ can understand.

Iemitsu and Nana are getting lovey-dovey.

Xanxus and Ken are eating the foods as much as they want.

Levi is standing right next to Xanxus which is also the same with Chikusa except that he is standing beside Ken.

Belphegor is throwing knives at Fon because he has decided to make Fon as his target practice. Fon, on the other hand, uses this as an opportunity to sharpen his martial arts skills.

Nozaru and Tazaru are with their brother Gamma, who is watching over Yuni.

Byakuran is eating some marshmallows while watching over the kids (namely I-pin, Lambo and Fuuta).

The CEDEF members, most especially Basil, are eating all of the Japanese foods prepared by Nana since they are trying to learn the Japanese culture.

Ryohei and Koyo are having some boxing showdown.

Skull is with Enma and his two remaining guardians doing who knows what.

The six funeral wreaths are just doing whatever they want like observing the place and etc.

Reborn, Colonello, and Lal are having some conversations about guns, bomb and etc.

Lastly, Tsuna is doing the best he can to prevent any fight from starting.

While the party is going on and everyone is enjoying the "normal" and "harm-free" party, Tsuna heard the doorbell rang and went outside to check on it.

When he arrived outside, he saw a mailman. The mailman asked for his signature and gave him two letters. He checked the letter on where it came from and to his surprise...

"MOM! DAD! I've received a letter from Ieyasu-nii and Natsu!" Tsuna shouted.

Tsuna caught everyone's attention. Iemitsu and Nana were delighted by these words and went to their son's side.

Tsuna opened the first letter which happens to be Giotto's letter and read out loud for everyone to hear.

~Ieyasu's Letter~

Dear Dad, Mom, and Tsuna,

It's been a long time. How have you been? I'm doing fine really. Being here in Italy is fun but it makes me miss home sometimes. To be honest, I'm getting homesick, some Boss I am. That's why I have decided to go back home. I'm planning to have a vacation there for who knows how long. Grandpa Timoteo had already agreed to my decision and he is coming with me together with my guardians. We'll be coming there next week. I hope all of you are doing well.

Sincerely yours,

Ieyasu Sawada

P.S: Hope Natsu is already there by the time I arrive in Japan. I miss teasing her a lot. Hehe...

Everyone was so happy to learn that Ieyasu will come home, especially Nana. So she had decided to prepare a feast by the time her eldest son arrives.

Everyone also knows about Ieyasu Sawada. He is also known as Giotto Vongola, the current boss of Vongola Famiglia. He is a powerful leader who succeeded after Timoteo resigned his post as the Boss of Vongola. He has everyone's respect and trust. He is also well-loved by his family and friends. He is the elder brother of Tsuna and Natsu. It has been said that after he stepped down as the Boss, it would be Tsuna who would replace him.

After reading Ieyasu's letter, Tsuna opened the second letter which happens to be Natsu's letter and read out loud again for everyone to hear.

~Natsu's Letter~

Dear Mom, Dad, and Tsuna,

It's been a long time. How have you been? Me? I'm doing fine, of course. Being here in France is fun but I'm getting homesick. Since my studies here in France are also about to end, I have decided to come back home to continue my studies there. I wish to see all of you soon. By the way, I'll be coming there next week.

Sincerely yours,

Natsuyume Sawada

P.S: I hope Ieyasu-nii is not there by the time I arrive in Japan. His very existence pisses me off.

Tsuna just sweat dropped at his sister's letter. He knows that the house would become a battlefield if his brother Ieyasu and his sister Natsu stay at the same roof.

Skull, who have heard the "P.S" of both letters said, "O-oi! I can sense that a storm will be coming next week."

"M-more than a storm, Skull-san, It would be a d-d-disaster..." Tsuna said while trembling.

Iemitsu paled at those words and said "No, Tsuna...it won't be a disaster...IT'S A CATASTROPHE!"

Nana giggled and replied "Well, let's just call some construction workers in case something happens to the house."

"Don't forget the AMBULANCE as well, Mom..." Tsuna countered.

"Xanxus, can you lend me 500 men under Varia? No...or maybe 1000 men?" Iemitsu asked Xanxus

"Why?" Xanxus asked.

Tsuna answered that question "Because they will serve as "law enforcers" to prevent any damages when Ieyasu-nii and Natsu comes home."

"Not that they would stand a chance though..." Tsuna whispered to no one in particular.

Even though Tsuna just whispered those words to no one, everyone present in the house heard it and they all sweat dropped.

Since everyone knows about Giotto, Now, they are curious who is this person named "Natsuyume Sawada" who could bring the devil out of their current boss.

Luce remembered that the last time she saw Natsu was when Natsu was still a baby. So she asked Nana.

"Natsuyume...Correct me if I'm wrong Nana-san but is that the baby girl who happens to be Tsuna's twin sister?"

~People's Reaction~

Tsuna's Guardians' reaction

"WHAT? Jyuudaime has a twin sister?"

"Ma~ Ma~ for real?"

"EXTREME! SAWADA HAS A TWIN?"

"kufufufu~ I wonder what she looked like? I can't wait to see her."

"Hn~ another herbivore.."

"WAHAHAHA...! Another subordinate for Lambo-san!"

Varia's reaction

*squeal* "Mmmmyyyy...! I can't wait to meet her in person!"

"Ushishishi...The prince likes to see her."

"VVVVOOOOIIII! Who cares about a single girl?"

"Hmph! Another Trash!"

"The Boss is right."

(I wonder if you could say that right in front of her face...?) Tsuna thought to himself.

Other's reaction

"To think Tsuna has twin sister...That's surprising...kora~"

"hm...Dame-Tsuna's twin sister...now that's interesting..." *smirks*

"Hahi~ Kyoko-chan, let's befriend Tsuna's sister once she arrives here."

"Hai...let's do that, Haru-chan!"

"Yay! We will have a new sister now...ne...I-pin?"

"Hai! Fuuta-nii! Yay! Can we call her Natsu-nee?"

"Yes, you can call her Natsu-nee but ask her once she arrives here. Ok?" Iemitsu, who is still pale, answered I-pin's question.

Nana answered Luce's question with the brightest smile she could ever produce "Yes, she is the baby girl who happens who be Tsuna's twin sister. She grew up to be such a lovely child."

Iemitsu who heard that "lovely" description fainted and Tsuna turned pale as if like his blood has been completely drained out of his body.

Author's Note: Please read and review, everyone...