A/N: Guess who might be allergic to local anesthesia and is taking pain meds? I once made an off handed comment about Shizuka dragging Tsuna on a quest to punch Iemitsu in the balls if Reborn never showed up, who knew I'd actually write it? So this crossover was born. And of course the Hibari family is involved, I liked them too much to leave out. *sweat drops* Hope you all are having a better day than I am.

Disclaimer: I don't own Katekyo Hitman Reborn! or Hunter X Hunter.

Hunters

Shizuka and Tsuna Sawada couldn't remember what their parents looked like. Their mother Nana had died when they were only two years old and their father never made any attempts to claim them. They were taken in by the local yakuza surprisingly enough, Satoshi had grandchildren that were around their age. Shizuka had a habit of following his older grandson around like a duckling when she wasn't dragging her brother into trouble. At that age, it was almost impossible to tell them apart without seeing their eye colors. Tsuna had warm brown eyes while his sister had icy blue eyes. Despite their unusual environment they adored their make shift family. Then they received news that their father, long believed to be dead, had been spotted in another country.

"What?! So he's just been traveling the world without a care? And with a kid?" Shizuka slammed her hands on the table, looking like she wanted to punch someone. Preferably their father. Now teenagers, it was easier to tell the twins apart. Shizuka had long bleached blonde hair, with her current scowl and her shinai she looked like a stereotypical yankee girl. Tsuna had spiky and surprisingly soft brown hair and a kinder demeanor. If you wanted someone to stop Kyoya or Shizuka from possibly killing someone, Tsuna was your best bet put a stop to it. Satoshi sighed, for once feeling every year of his old age. "Apparently he is part of a mafia family in Italy and part of the upper echelon." Satoshi informs them.

"So he chose them over his own family." Tsuna says quietly. Over the years he'd held onto the hope that their father was alive and that he'd eventually return so they could be a normal family. To hear that he had abandoned them for a criminal organization had been a low blow to his self-esteem. Satoshi's son was a Hunter and even he tried keeping in touch with the man. "I say we go to Italy and make sure he can't father any more children." Shizuka says bluntly, a dark glint in her eyes.

Satoshi chuckled. "As much as I admire your enthusiasm, may I suggest something else?" Tsuna looked between Satoshi and Shizuka, feeling the sudden urge to run away and never look back. He learned over the years that the only remotely sane Hibari was Masahiro, the man was practically Shizuka's babysitter from a young age. He looked like an older version of Kyoya with his hair in a short braid and round wire rimmed reading glasses. "Is it illegal?" Tsuna asks, Satoshi raised an eyebrow. "I am well aware of your aversion to criminal activities Tsunayoshi. It isn't often that one of the Baku returns shop lifted items out of guilt." Tsuna blushed in embarrassment.

"Back to the topic at hand. You remember my son's current occupation?" Satoshi asks, the twins nodded excitedly. When the man was in Namimori, he would tell the children about his travels and all the criminals that he apprehended. "He's a Hunter that specializes in capturing criminals. So we could... arrest him?" Tsuna spoke tentatively, Shizuka appeared to have an epiphany. "Or... we could completely dismantle the family he's working for by arresting their members until we eventually get to Iemitsu. We kick him in the balls a couple times and then throw his ass in prison." Shizuka says cheerfully. Now that the idea was in Shizuka's head, there was no way Tsuna could dissuade her.

XoXoXoXoXo

To even be considered for the upcoming Hunter Exam, Shizuka and Tsuna were pushed to their limits. Shizuka was sparring with Kyoya when a small flame sputtered to life on her forehead, distracting her just long enough for her opponent to slam a tonfa into her ribs. She would complain about the bruise later that day but was ecstatic about her sudden ability to create fire. Tsuna had accessed similar flames when they were children but he had been so terrified that he never attempted to summon them again.

Satoshi sighed. He figured that the siblings were from a strong bloodline when Masahiro and Kyoya showed signs of being courted by Skies. "Those flames that you created are dying will flames. Outside of the underworld people also call them nen. They feed on your determination. What were your thoughts when you activated them?" Shizuka looked thoughtful. "I was thinking that I wanted to defeat Kyoya for once and be strong enough to protect our family." She says. "These flames don't have any side effects, do they?" Tsuna asks cautiously.

"There are several risks. The most common is flame exertion, when you use them to the point of exhaustion. There are quite a few flame related ailments but as long as you don't use them all at once you two should be fine. From what I know, mastering them is part of the Hunter Exam as well. Neither of you have Cloud flames so I wouldn't be an effective master." Satoshi states, Tsuna deadpanned. "Basically you just don't feel like it."

Telling the Hibari brothers that they were leaving Namimori to take the Hunter Exam lead to Shizuka and Tsuna being "bitten to death." "Admit it Kyoya, things in Namimori are boring when you're at the top of the food chain. We're going to disrupt some real carnivores." Shizuka says, pressing a bag of ice to her head and glaring at the prefect. She was somewhat depressed that Masahiro couldn't go with them since he had to oversee Baku with his grandfather. "Someone needs to keep an eye on you herbivores." Kyoya says gruffly, letting the siblings register what he said. "What?!" "Hieee!" There was a heavy thud. Surprisingly it was Shizuka that was now sprawled out on the ground, not her brother.