This is an experimental attempt at a HibarixOC story featuring snippets of their daily lives and the progress of an organic relationship between the two characters. Hopefully, this will turn out well!

Disclaimer: FANfiction. I only own the OC. Any changes to the original canon story is due to the fact that this is fanfiction.

Warning: May contain coarse language due to Squalo's mouth. And the OC's. Rating may also change depending on how the story proceeds.

Enjoy!

"VOI! WHERE'S THE FUCKING BOX WITH MY THINGS?"

A spiky-haired brunette cringed as he listened to the extremely loud yelling. Tsuna had been standing outside the heavy mahogany doors for at least ten minutes now, attempting to gather the courage to push the button beside the door.

"Hey, useless. Press the button," a deep voice startled the reluctant mafioso.

Tsuna turned towards the owner of the voice with a comically terrified expression as he made eye contact with the nonchalant man standing beside him, glaringly contrasting with Tsuna's slightly-worn street clothes as he dressed in an immaculately pressed suit. A sharp glare from underneath the brim of Reborn's fedora combined with over six feet of towering menacingly over the high-schooler did nothing to instil a different kind of fear into the mafioso. "I can't! They're still too scary!"

Indeed, after having his powers peak at a point where they were considered legendary, it was still near-impossible for sixteen-year-old Tsuna to stomach certain fears - one of them was dealing with the infamously dangerous and volatile assassin squad, the Varia.

Squalo was the scariest one of them all, if you didn't count Xanxus. And said person sounded to be in the foulest of moods, currently, and Tsuna was less than enthusiastic to face him.

"Hey, has anyone seen a box with my knives? I'm missing one. I'm pretty sure I had ten of them," Belphegor. That was also another particularly scary one. Eldritch and borderline asylum-worthy insane, the Decimo was not a big fan of the self-proclaimed prince.

"I'll go look!" a female voice? Tsuna turned to face the Sun Arcobaleno, a startled look on his face. "Who's that?"

Reborn pulled impatiently at his favorite fedora, and Leon crawled onto his hand. Stroking the reptile with his fingers, Reborn gave his reply, "That's probably their newest member. I heard from the Ninth that the Varia recruited another officer because they were missing a specialty for some missions of theirs. Now will you press the doorbell?"

A series of crashing and thumping startled the boy, and the Vongola Decimo winced as Squalo swore loudly.

"GOD FUCKING DAMNIT!"

"Er…Bel? I think I found the last box,"

"Ka-ching,"

"WHO THE FUCK PUT THIS BOX HERE!?"

"Oh dear! Squ-chan, that's why I told you to walk slowly!"

"I DON'T FUCKING CARE LUSSURIA! JUST GET THESE KNIVES OUTTA ME!"

"Shishishishi. Clean them before you return them to me, peasant,"

"Does it hurt that bad, Kisame?"

"DON'T FUCKING CALL ME KISAME, YOU FUCKING CIRCUS TRASH! AND WHO THE FUCK ARRANGES THEIR KNIVES IN A BOX WITH THE BLADES POINTING UPWARDS!?"

"Bel does?"

"Got a problem with that? Shishishishishi,"

"FUCK OFF YOU WORTHLESS SCUM!"

Tsuna cringed at the vulgarity that was apparently rebuffed without any offense taken. Reborn sighed and smacked Tsuna on the back of the head. "Stop standing there and eavesdropping. Ring the doorbell,"

"I-I don't want to," Tsuna mumbled, terrified at the very thought of having to face the very boisterous and dangerous assassin squad. Squalo was always brandishing around his sword around for no reason as a reflex when he wasn't on duty, and Tsuna didn't even want to find out what the other members of the Varia did when they weren't on missions. And not to mention the fact that Xanxus would definitely kill him if he saw Tsuna.

Nopenopenope. There was no way he was going to see the unpredictable leader of the psychopathic assassin group.

"Useless," Reborn muttered, before aiming his fist at the back of Tsuna's head, making the boy fall forwards. His forehead came into contact with the doorbell, and it rang; a brassy chime resonated throughout the mansion.

"Oh no!" Tsuna immediately got up, skipping the part where he usually groaned and groused, due to the fact that the sore tingling on his forehead meant that-

"Visitors!" quick footsteps could be heard near the door, and a very excited Lussuria threw the doors wide open. Instead of his usual black trenchcoat, the assassin had opted for a colourful number that combined purple, blue and pink, which clashed horribly with the green tuft of hair that sat swept to the side of his brown hair. "Welcome!"

Tsuna stood there with a dumbstruck look on his face, eyes hurting from the psychedelic patterns on Lussuria's clothes. His arms were still cradling the bento his mother had made him take to give to the Varia as a housewarming gift - surprisingly, he had not dropped it when Reborn had hit him. "Er… hi there,"

"Ciaossu," Reborn tipped back his fedora slightly in greeting. "Settling in okay?"

The faux-hawked Sun Guardian peered closely at the cowering high schooler, and recognition registered on his face as he raised his eyebrows and grinned widely. "Squ-chan! Look who I found at the door!" he pulled his head back into the house to yell.

A silver-crowned blonde popped up beside the Muay Thai boxer at Lussuria's mention of visitors. He tilted his head back in interest, and smirk was plastered onto his face as he laughed spookily in a way that made chills run down the Vongola's spine. "It's the Vongola peasant and the Arcobaleno!" Belphegor announced with a glee that made Tsuna very, very nervous. His eyes were fixed on the open box of customised knives that the Storm Guardian had tucked under his arm.

"DO I LOOK LIKE I GIVE A FUCK? WHO IS IT ANYWAY?"

"The Vongola peasant and the Arcobaleno, captain. I told you that, didn't I?"

Tsuna emitted a strangled squeak at the sight of the silver-haired Varia captain standing a little way behind Lussuria. Squalo, with no change in the perpetual frown on his face, stepped forwards for a better look before a glint of recognition glazed his eyes. The brunette took a hesitant step backwards immediately as a psychotic grin grew on the swordsman's face.

"Well look who it is! It's the snot-nosed Decimo brat!" Squalo stopped beside Lussuria, "What do you want?"

Thrusting his arms forward, Tsuna squeezed his eyes shut as he shoved the bento into Squalo's face. "My mom said to give this to you! She said you'd probably be too busy to make dinner after unpacking, so she made dinner for you!"

Tsuna opened one eye warily to see an extremely displeased expression on Squalo's face. "WE DON'T NEED YOUR CHARITY, GOD FUCKING DAMN IT!" Squalo rammed a hand against the doorframe.

Tsuna backed up, trembling in fright. "Reborn, help!" he cast a desperate look over at his tutor, but the man had already left his side and was standing a few feet away from where he had been. Reborn turned to look at Tsuna, before turning his back on him and took a lazy drag of a half-burnt cigarette. When had he moved!? Tsuna wanted to kick him. It was his fault that he was in this predicament in the first place! If the Sun Arcobaleno had only allowed him to leave the bento on the doorstep, he wouldn't have had to face the scariest group of assassins alive!

"Food! Man, am I hungry. I hope there's onigiri,"

Both prey and predator stopped and looked at the sudden interruption. A dark-haired girl around Tsuna's age clad in the standard colours of the Varia squad - black - stood behind Lussuria. Pulling down a pair of goggles from around her eyes, her green eyes sparkled with inquisitiveness as she looked up at Squalo. "Hey, Kisame. Won't this save us the trouble of having to go out and buy take-out? I mean, the chef's not here yet, and none of us can cook for shit."

Lussuria furrowed his brows, a dramatically worried expression on his face as he rested a gloved hand against his cheek. "Ri-chan's right, Squ! We're not even properly accustomed to the layout of the area yet! We could get lost!"

Belphegor snickered as he picked up a knife from the box and toyed with the blade. "Two against one, captain. Looks like we'll have to accept the peasant's offering,"

Squalo glared at the girl, making an irritated sound. "Bah! Do whatever the fuck you want!" he grumbled, stomping back inside.

Tsuna chuckled nervously. "Here's the bento," he passed the large parcel over to the Sun Guardian.

"Please thank your mother for us! This is such a lovely gesture! The Boss is in his room right now. Would you like to see him?" Lussuria gestured towards the vast hallway, "His chambers are up the second floor. The stairs are just down the end of this hallway."

Tsuna was quick to shake his head. Pop in and say hi to a man who would rather see the Decimo's head on a pike? "N-No! That's fine!" was his hasty rejection.

Lussuria shrugged. "Well, come on in!" he stepped back, "I'm sorry I can't talk with you, though. Bel and I have to finish moving our things into our rooms. Ri-chan here will keep you company!"

"She juggles," Belphegor added shortly, smirk still intact. The teenage prince then left with Lussuria, leaving the girl alone with Tsuna still standing outside on the doorstep, and Reborn, who flung a cigarette butt onto the ground and snuffed out the glowing end with the heel of his expensive Italian shoes.

The Arcobaleno finally made his way back to the doorway. His sharp gaze swept over the stranger analytically. "Who are you?"

Tsuna realized that he had no idea who the girl was, as Reborn began what seemed like a short interrogation. He looked at her surreptitiously, taking in the external details of the girl.

The ends of her black hair ghosted her shoulders, and her frame was slightly on the smaller end of the spectrum, clothed with a black hooded sweater that had sleeves that extended far beyond the normal length, covering up her hands. It was clear that the girl was a member of the Varia from the colour of her clothes - what with the black shorts, black goggles and leather boots - as the shield that held the symbol of the assassination squad was stitched onto the left sleeve of the sweater.

Her mouth opened, but instead of Japanese, a flurry of perfectly-accented Italian came out instead. Reborn raised an eyebrow, following her without missing a beat. He responded smoothly in Italian as well, leaving the brunette at a loss for words.

Tsuna, on the other hand, was struck by surprise. For a person that was clearly Asian, he had not expected Italian to come out of her mouth. Hadn't she been speaking Japanese perfectly just a few moments ago?

Five minutes passed, and when Reborn pulled out a gun from the holster beneath his jacket, alarm bells went off in Tsuna's head at the sight of the firearm. Was he about to shoot the girl!? The conversation had sounded so harmless! Tsuna decided to interject in his loud Japanese before any blood could be shed. "I can't speak Italian!"

The conversation stopped immediately, as the spotlight focused on Tsuna. He suddenly felt very self-conscious. "Er, if it's alright, could you please speak in Japanese?"

The girl tilted her head sideways, giving the high-schooler an apologetic smile. "Sorry about that," the Japanese slid back without any trace of a European accent, "Y'see, I've just heard stories of Reborn back in Italy. It's amazing how he's got his form back in the span of two years!"

'That doesn't even explain why you were speaking in Italian!' Tsuna shouted mentally in frustration. 'It also doesn't explain why Reborn pulled the gun out!'

"Yang Riko," Reborn tucked the gun back into the holster, "I was aware that the Varia had recruited a new member, but I wasn't aware of the fact that you were Tsuna's age,"

"Oh, is that his name?" Riko shifted her attention from Reborn and towards Tsuna. "Y'see, the Boss refers to you as 'that trash' while Kisame calls you 'wimpy trash', so I'm not really familiar with your name, Vongola Decimo,"

She was clearly, clearly an expert at Japanese, seeing how she had no problems quoting the abusive names that the Varia had for him. Tsuna cringed at the derogatory appellations.

"Yang Riko! Assassin number V009," A sleeved-covered hand was shoved in his direction, "It's pretty cool to put a face next to the name! Well, the Vongola Decimo name, anyway."

"Sawada Tsunayoshi, but you can call me Tsuna," Tsuna reluctantly took the sleeve-covered hand that Riko offered and shook it. Assassin number? "Is it true?"

"What's your role as a high-ranking Varia officer?" Reborn interjected, before Riko could reply, "I wasn't aware that they were missing a key set of abilities. Are you the Cloud Guardian replacement?"

"Well, I'm not a Guardian of any sort," she said, "Since Bel's the Storm Guardian. But I do have a ring,"

Reborn crossed his arms. "You're a storm attribute person, I see," he mused.

Tsuna was slightly surprised that Riko was so… normal. He had half-expected the newest member of the Varia to be just as frightening and batty as the rest of the bunch, but aside from the sliver of queer eccentricity displayed by her appearance and ability to talk to Squalo normally, Riko was definitely not what the Vongola heir had anticipated.

"Did you meet the standards of Varia quality?" another question from Reborn. This time, a shiver ran up Tsuna's spine as he realized that he had possibly misjudged Riko from her character.

'That's right! The Varia are all first-class assassins! If Riko's part of the top ranks, that means-!'

The brunette looked at the seemingly-normal Varia officer in horror. '- SHE MUST BE SCARY!'

Riko nodded in response to the Sun Arcobaleno's question. "Sure did," she confirmed, causing Tsuna to start inching away.

'Don't want anything to do with the Mafia, don't want anything to do with the Mafia…'

Reborn rubbed a hand against his chin thoughtfully. "So, what's the specialty the Varia were missing? I wasn't aware that they were lacking in something. Gola Mosca's loss didn't have that much effect, since he was barely in the Varia. He hasn't been around since the ring battles, and that was two years ago."

"Does it matter what my specialty is?" Riko asked, raising an eyebrow, "I mean, we have Mammon, but we've also got Fran. He's off training with Rokudo Mukuro right now, of course, but he's number V008, so he's definitely coming to join us soon."

Reborn narrowed his eyes in suspicion. This girl was evading the question — was she hiding something? His expression did not go unnoticed by the assassin — she smiled. "Well, if you really must know—," she reached a hand behind her head, and pulled the hood of her sweater up, a pair of unidentifiable animal ears sewn to the hood stuck up proudly, "— I'm the mascot!"

Tsuna stared at her, baffled. Reborn merely smirked.

"VOI RIKO! CLEAN UP YOUR SHIT!"

At the sound of the swordsman's voice, Riko sighed, letting the hood fall back against her back. "I'm COMING, KISAME! Calm YOUR TITS!" she turned back inside to yell, before facing the tutor-student pair again. "Look, I've got to go now. Thanks again for the food! I'll bring the containers around to your place when we're done with them. See you soon, I guess?"

Reborn nodded — this would have to satisfy his curiosity for now. "Say hi to Xanxus for us,"

"O-Or don't…" Tsuna mumbled, "B-Bye…"

"Ciao!" and with that, the wooden doors shut with a thud.

"Is she really the mascot, Reborn?"

"We should get one too. We mustn't lose to them."

"You're ignoring my question!"

Let me know how you liked it!

Delphoxi