CHAPTER 1: UPON THE INHERITANCE

This story takes place after the Future arc, as Tsuna and his guardians prepare to inherit their rightful places as the Vongola Decimo and his Guardians. Ever since the fateful day where Reborn showed up at his house, it had been three years of constant turmoil, battles and resolve to protect his friends. Despite being eighteen, he still was "No-Good Tsuna", and he was not completely accepting the fact that he was to be the head of the Vongola family. But Tsuna was about to become Vongola Decimo. For the sake of protecting his friends and everyone around him.

"Alright, I understand."

Dino Cavallone sat across the desk, facing his junior from Mafia school. He stared at the seventeen year old girl, knowing fully that he could trust her. "Setting up her own organisation within the Vongola and running it so well that even the Ninth acknowledged her power… She truly is amazing," Dino thought to himself.

"Sheesh, stop staring at me already!" She laughed. "I know we haven't seen each other in ages, but there'll be plenty of time for us to catch up. After all, I'm going to have to bring you in when I train that troublesome student of yours."

"Kyoya?" Dino sighed. "Yeah… He's a real troublesome kid alright. But he's not the only problematic one."

"I know," she nodded. "I"ve spoken to all the tutors of Tsuna and his guardians. Each of them have certain areas I'd like to work on. I don't know how they'd take being trained by someone younger than them you know."

"You're capable and you know it. You've trained so many members for both combat and intelligence."

"I'd still like to do a good job. Anyway, it's about time. We need to go for the party tonight. It's my chance to interact with them without them knowing who I am yet."

The ballroom of the Vongola headquarters were lit up by massive chandeliers, illuminating the floor as guests flooded in to celebrate Tsuna's reign as Vongola Decimo. Members of the Vongola family and their allies bustled in the room, chatting with one another about recent developments in the mafia world with cocktails in their hands. Tsuna and his guardians, all donned in their formal suits, descended down the carpeted staircase, Tsuna leading the way with Gokudera standing slightly behind him, followed by the other guardians.

"This is too crowded for my liking." Hibari grumbled. "When can I leave?"

"You can't Hibari! This is an important occasion! WE NEED TO ENJOY IT TO THE EXTREME!" Ryohei grabbed Hibari's arm excitedly.

"Haha senpai, you're all fired up already?" Yamamoto grinned.

"Keep it DOWN!" Gokudera turned to Ryohei angrily. "Stupid Turf-top!"

"Lambo-san wants to play!" Lambo squirmed and flailed his arms happily.

"You can't…" Chrome muttered, holding Lambo tightly in her arms.

"Hmm… Guess the reports were quite accurate. Training them is going to be difficult, but if all goes well, they'll be really strong. And they'll be able to protect the innocent, just like Vongola Primo. That's what the new Vongola Decimo wants to do anyway. And I like that." She thought, before walking towards Tsuna.

"Congratulations, Vongola Decimo!" She smiled, approaching Tsuna.

"Ah?" Tsuna scratched his head sheepishly. "Umm… Thank you."

"Well, I'll be seeing you very soon on a daily basis. And your guardians as well!"

"Umm really?" Tsuna smiled. "Alright then!"

Tsuna and his guardians followed Dino to the huge mansion adjacent to the ballroom after the party was over. It was past midnight and most of the guardians were exhausted, ready to retire to their respective rooms in their main quarters. However, Dino ordered them to follow him, telling them that they had an important meeting that could not wait for the next day. "What's this familiar feeling? I feel like we'll be seeing someone we've met before." Tsuna thought to himself, unable to shake off this feeling he had. He put his thoughts on hold as he ushered them into the room at the end of the corridor.

Once he entered the room, he was instantly greeted by a familiar face he had seen that night. A young girl was sitting on top of the huge wooden office desk, smiling at him. She had light orange hair that faded to a pale shade of pink, ending slightly below her collarbones. Her clear blue eyes met everybody, as she looked into their eyes. Nodding at Tsuna, she hopped off her desk and walked up to him. She clearly was not very tall, her height being quite close to that of his. All of a sudden, she pulled him into a friendly hug, causing Tsuna to scream frantically and the other guardians to stare at her in bewilderment.

"Glad to finally be able to meet you." She laughed. "I'll introduce myself before Dino does it for me."

"Who said I was going to?" Dino grumbled.

"You know you wanted to." She laughed. "So… Hello everyone. My name is Iiya Kunaizu. I'm the boss of DS55, the elite squad in charge of both combat and intelligence relating to the Vongola Family. But mainly we are in charge of training and protecting the leader of the Vongola and his guardians, especially after the inheritance ceremony."

"She'll be training every single one of you guys starting from tomorrow."

"REBORN?" Tsuna gasped. "AND WHAT? TOMORROW? DON'T I GET A BREAK?"

"You're Vongola Decimo. You don't get one."

"BUT REBORN!"

"No buts!" Reborn shouted, jumping up to the desk and settling himself on Iiya's shoulder. "Iiya formed DS55 when she was fourteen and single-handedly developed it to become one of the most elite squads within the Vongola. You're lucky she turned down the Ninth's suggestion to be a successor of the Vongola, or you would've been fighting both her and Xanxus."

"She formed the squad at FOURTEEN?" Tsuna screamed.

"Yeah. DS55 is split into two departments, namely the intelligence and combat department. I don't need to explain what each department does. But just know that she's extremely well-versed in both and younger than all of you, except for Lambo." Dino nodded.

"Heh enough about me…" Iiya blushed. "I still need to explain the plan for tomorrow and tell you what you need to prepare."

Reborn and Dino nodded at her, leaving her to explain the details of the training programme to the seven standing before her.

"I'll start with you since you can't stand crowds. I think you're probably itching to leave." Iiya's face darkened into a serious expression, her eyes piercing and staring right into Hibari's.

"Are you strong?" Hibari asked, his arms folded.

"You'll see tomorrow." She spoke. "Come armed. We're going to spar tomorrow. Dino will bring you to the training center within Vongola's headquarters. I know you're strong, so we're going to make you even stronger."

Within a split second, Hibari whipped out his tonfas and lunged towards her. If there was anything, he hated being tutored by anyone, not even Dino. He wanted to do as he pleased, not be restrained and forced into doing something he was not interested in.

"Oi, Hibari!" Gokudera shouted, as the clashing of metal rang throughout the room.

Iiya had drawn her weapon, her left hand gripping silver metal. The metal was moulded to form three quarters of a circle, leaving space for her hand to slip through and grip the steel handle stretching across the diameter of the incomplete circle. Everyone's jaws dropped open in shock, not expecting her to be able to defend against Hibari's attack so quickly. Tsuna heaved a sigh of relief, glad that she was not hit and that he did not have to fight her during the representative battle.

"I hope you'll come fully prepared to fight me tomorrow, Hibari Kyoya." Iiya said. "Goodnight, Hibari."

Hibari smirked, keeping his tonfas and walking out of the door.

"Next up would be… Ryohei Sasagawa." She nodded.

"Yes! I'm ready for your training to the extreme!" He pumped his fist into the air, all ready to begin.

"Your strength and power is satisfactory. I'll be working on your speed while raising that power of yours. I'll be waiting to see some extreme improvement. Colonello will be coming to observe you too."

"YESSSSSSSSSSSSSSSSSS!"

"Lambo?" She smiled. "Be ready to play the most fun game tomorrow!"

"YAY! Lambo-san wants to have fun!" Lambo waved his arms excitedly.

"Chrome! I'll be working on your combat abilities. I'm not good with illusions so I've called Mammon to help me a bit tomorrow… It was quite costly but I know it'll be worth my budget!"

"Yes!" Chrome smiled.

"Tsuna, Reborn will be helping me with training your stamina further." She nodded. "Increasing your endurance will help you be able to use more strength while staying in Hyper Dying Will Mode. So be prepared to be doing lots of running and climbing!"

"NOOOOOOOOOOOOOO!" Tsuna wailed. "Not again!"

"And next will be Yamamoto!" Iiya spoke, continuing down the line. "Your athleticism is good, so let's keep going on that. I'll be trying to speed you up and I'm bringing in Squalo to help me. He was quite willing to help and said he was going to kill you, so don't die!"

"Ahaha!" Yamamoto laughed nervously.

"Don't worry, if need be, I'll take Squalo on." Iiya grinned. "Ok last but not the least, Gokudera!"

"Yes!"

"I'll be helping you upgrade your Sistema C.A.I. further and make it stronger. I'll be training you to become the most reliable right-hand man ever, and help you defend your boss and the family better."

Gokudera bit his lip, feeling both determined and confused at what could possibly happen for him.

Iiya relaxed on her chair, closing her eyes briefly after Tsuna and his guardians left the room, leaving Reborn and Dino with her. She sighed, wondering how Dino and Reborn were able to keep this family under control. Drawing her weapon on their first meeting proved too shocking for her. Vongola Decimo's family was so diverse, she wondered if she would be able to train them properly. Training some of them would be manageable, but she suspected that she would need to pay more attention to the problematic ones. "Hibari Kyoya is going to be a pain… But I knew that from the start. It's Tsuna's right-hand man that'll be an issue. I don't think he thinks I'm good enough to tutor him." She sighed.

"Sighing over Gokudera?" Reborn asked.

"You know what I'm thinking of, right?"

"Don't worry, just get some rest." Dino smiled. "Everything will fall into its place."

Author's Note:

Hi everyone! I've actually put off this story for a couple of years before deciding to edit and start on it. The pairing will take a bit of time to start up since I need to set everything in place. Romance-wise I do have a direction in mind, but I'm still thinking about the ideas I want for the conflict.

Please rate and review and hopefully I'll be able to upload more often since it's the holidays! (Same goes for my Bleach series) Thank you for reading! :)