Title: Secret

Rating: T

Pairing: ColonelloXTsuna C27

Summary: Requested by runes01 and I-Kill-U-For-Yaoi; People have secrets, everyone does, even Colonello himself. So when Tsuna gets sent off to train with the blond, he's unaware that this secret involves him.

Disclaimer: don't own and if I did then the whole world would be filled with yaoi

N/A: This is ten years later plus a few months!

"We can easily forgive a child who is afraid of the dark. The real tragedy of life is when men are afraid of the light." Plato

Chapter 1: Surprise

Tsuna stared at Reborn in shock.

"What?" His large eyes blinked, observing the man before him in disbelief, he had to hear what was said one more time to make sure he wasn't dreaming. Reborn, an adult now since the curse had been broken less than a year ago (after the Millefiore incident), huffed and folded his arms, leaning against Tsuna's desk. And because of his new size, Reborn now came across as threatening; no longer did he appear as an innocent-looking baby that was cute and adorable. Instead, he was a very tall man that appeared more like an assassin and was someone no one wanted to meet in a dark alley (Tsuna will never go outside alone again because of him, not that he did with his guardians watching over him like a hawk). His usual fedora was tilted downward to the side, covering only half of his face, and it gave him that dark evil appearance. Tsuna, aged twenty-five, had numerous stacks of paperwork in front of him and held a pen up in mid-writing, almost dropping it at Reborn's statement.

"I said that you're going to be training with Colonello for a whole week at his place. He'll be taking care of you there." Reborn stared down at the Vongola boss as if daring him to argue back and Tsuna almost did if he hadn't start shivering at the glare. The hitman was terrifying. Unfolding his arms, the ex-arcobaleno pulled away from the desk and headed towards the door, pausing briefly when opening it. "He'll come to pick you up tomorrow in the morning and make sure you pack your stuff, you won't be allowed to come back until later."

Tsuna nodded and opened his mouth to speak but his voice stuttered at the last moment as his question came tumbling out. "W-What about Gokudera-kun and Yamamoto? And my paperwork…"

Reborn huffed. "I'll take care of those two idiot guardians of yours, this will actually give me a good chance to get them some badly needed training, all of them. And anyway, I'm doing this for Colonello, not for you. As for your paperwork, I got someone to take over for it."

"Huh?" Tsuna blinked, confused, though somewhat happy that he wouldn't have to do his paperwork when he came back. That might have been a nightmare in the making. 'But what did he mean by 'for Colonello'?'

The hitman slowly closed the door behind him, leaving his boss alone to question what he had meant. A smirk remained on his lips. This was definitively going to be killing two birds with one stone.

Tsuna was nervous, clutching his luggage that was holding all his things, well those that were necessary like his mittens and pills (which both were in his pockets) and some clothes. His contacts were already in his eyes and his headphones were on his shoulders just in case.

Truthfully, he had never been alone with Colonello before, not even when the now ex-arcobaleno was a baby. Usually, there was always someone with him and most of Colonello's attention would be on the other instead of him. So nothing had really changed all that much when the blond was turned back into an adult, it was just the same routine every day. Tsuna shook his head at the thought.

Exiting out of the Vongola base where he could see plenty of his guards standing around in the area, he walked forward towards the entrance area which was mostly a long road. Instantly, his eyes went straight to the tall blond that was in a parked car. What type? Tsuna had no idea but he was certain that it was expensive. The vehicle was painted a beautiful azure blue with two seats and a retractable roof, which was down right now. The car was currently on, the engine running with the fumes coming out from the back.

Tsuna's gaze drifted from the car to the blond within. Colonello was dressed the same as usual with his military-styled clothes and familiar bandana that held up his blond locks. He had his right arm on the top of the door, leaning against the seat, and seemed to be messing with the mirrors with his other hand. The blond glanced up when he saw the brunet out of the corner of his eyes and lifted up a hand. "Yo, kora!"

Stepping closer, Tsuna stopped when he was right in front of the car, on Colonello's side. He had to look down to see the face and peered into the baby blue eyes. "Hey, Reborn told me that you're going to be training me…"

"Yeah, that's right." The blond grinned and leaned against his door (the windows were down too), giving that usual bright grin of his. Suddenly, his expression died down to something akin to curiosity. "Actually, do you know why he asked me, kora?"

Tsuna blinked and then tilted his head. "Huh? I thought you asked for me? That's what Reborn said to me."

Colonello stared and then shook his head, finding this situation kinda odd. He put a mental note into the back of his mind to find out what Reborn was planning, right now, he had to deal with Tsuna. "Well, whatever, I'll make sure that you get into shape, much better then Reborn can! So get ready, kora!"

The brunet paled at that, already scared. He still remembered how Colonello, along with Reborn, had treated him back at Mafia Land ten years ago and quite honestly, he didn't want a rerun of that. Not only that, he had heard of some of the training from Ryohei and he knew it couldn't be any different than Reborn's. Tsuna was quite certain that by the time he came home (which is the base), he would be sore and aching everywhere.

"Come on, Sawada. Let's get going." Colonello gave a hard shove from his spot and with quick reflexes, snatched the suitcase out of Tsuna's hands, tossing it behind the seats where there was a gap of space.

Tsuna sighed, following along blindly, and got into the car from the other door. Buckling himself in, he braced for the torture that was to come.

Colonello chuckled at the expression that was obviously visible and glanced back at the base for a moment before narrowing his eyes. He glared at the onyx orbs that were looking back through a window, watching him and Tsuna. Pressing the gas pedal while resisting in flipping off Reborn, he drove off and disappeared into the distance, out of range from those damn eyes. He wasn't sure what the hitman was planning and though he wanted to know, at the same time, he didn't. Anything with the man spelled bad news and he knew that he was going to be placed into the center of this plan if those eyes weren't saying something.

As the duo went out of the Vongola area and into the wooded regions of Venice that surrounded it, Colonello leaned against his seat, relaxing, and felt the wind shift through his hair, gently whipping his face. He had one hand on the steering wheel and stared straight ahead into the distance, hearing the humming of the car and feeling the bumps on the road.

"So…um… Colonello, where are we going?" Tsuna asked, looking up at the blond curiously as he placed a hand over the side of his face to prevent his hair from slapping him. The hoodie he was wearing for today was flying behind him and his gloves and pills were in his pockets. He had dressed down from his normal clothes that consisted of black and white suits and it was somewhat nice for the change. The blond stared at him for a moment, the ends of his bandana flapping behind, with his blue eyes were almost sparkling. His antitank rifle was currently in the back with Tsuna's luggage and suddenly, he broke out into a grin.

"Well, we're heading to my place, kora. It should take about three and a half hours to get there and I'll show you around the place after we have a match." The blond reached back, switching hands on the steering wheel, and patted his weapon. There was no one else on the road except for a couple cars that had already passed them. The sun was getting higher into the sky, mid-morning at during this time, and its rays were shining brightly down on the two.

Tsuna immediately tensed at the sight of the gun and groaned depressingly, burying his face into his hands.

"Now don't do that. It'll be fun, kora. This will tell me how much I really need to teach you and what."

"O-Okay…" The brunet, regardless, swallowed nervously, wondering how the fight would go. Would he be beaten up like usual or was this actually going to be a training session? Tsuna's eyes trailed over the blond, his thoughts going wild. As he did that, Colonello twisted back to the road, turning the wheel slightly to the side. The rest of the drive was in silence but that might be because Tsuna eventually fell fast asleep, leaning against the door as if it was a pillow.

"Sawada!" A voice called out and then came some shaking from the side. "Wake up, kora!"

Twitching at the yell, Tsuna slowly fluttered his eyes open and then yawned, stretching his limbs tiredly. He rubbed his eyes, readjusting his contacts, before looking at the person that had wakened him up. His honey-colored eyes focused on the bright blue orbs that were staring in return before scrambling back in shock, pressing his body against the door and seat at the same time. "Huh? What?" Glancing around the area, he noticed that the car was parked in front of a house and that Colonello was leaning over him awkwardly. The blond had his hand on the door on Tsuna's side, using it to hold himself up, and was bending over his seat with his other hand on the brunet's shoulder.

"Wow, Reborn wasn't kidding that you sleep like the dead, kora." Colonello didn't pull back and continued to stare at the brunet with a smirk.

Tsuna gulped, still pressing against the side, and felt uncomfortable at their closeness. His eyes roamed over the man before him, noticing things he hadn't before like the way the blue eyes seemed to darken and lighten upon the ex-arcobaleno's mood. And there was a faint scent of rain with a mix of cologne on the man. "C-Colonello… W-What is it?"

The blond just grinned wider before pulling away. "Nothing." He opened the car door and got out, taking out his antitank rifle and Tsuna's luggage from behind and held both of them up with such ease that it made Tsuna pout (seeing as he struggled with his bag). "Well, this is my home, kora."

At that mentioning, Tsuna blinked his eyes, looking over the said place once more. It wasn't very big, a two-story that was made out of a combination of bricks, stones, and wood, and had multiple windows here and there. All in all, it actually looked cozy for a military-styled man. Getting out of the car, Tsuna walked over to the blonde's side, taking in everything he could see before following the other as they went up the stairs.

The two stopped at the front door and as the blond fished his keys out, Tsuna couldn't help but wonder what was going to happen to him during his stay here but decided to push those thoughts back. As he entered, he looked around the insides and couldn't help but be slightly comforted by how normal it looked. The brunet had been expecting expensive and flamboyant things like statues, paintings, and furniture like in Reborn's own place (probably used to lure people) so it seemed really odd to him that Colonello would be the opposite.

"Just drop whatever you want here." To emphasize his point, Colonello tossed the luggage onto the couch with his keys and wallet. However, the rifle was still with him. "Right now, we're going to start training and see what you can do, kora."

"O-Okay…" Tsuna didn't have anything to drop off and instead got himself ready by putting on his mittens. There was a large mirror close by and he glanced at it, looking himself over. He had to admit, it brought back memories of his younger days (he's twenty-five remember) since he could no longer really wear normal clothes. Colonello glanced at the Vongola boss for a moment before leading him outside where there was a large opened space with trees surrounding the area but he didn't stop there. They went past that and into the trees, passing through. Getting as far away from the house as possible since neither of them wanted to destroy it by mistake, they both got ready for their little fight as they entered another opened area. An orange flame burst onto Tsuna's forehead the moment he popped one of the pills into his mouth and it glowed brightly there. His eyes changed from a honey color to a calm orange, cool and reserved. His white mittens that had the number twenty-seven stitched on top changed into his Vongola gloves and he eyed the other across him warily. "Whenever you're ready."

Colonello nodded in response and instantly went onto the attack, doing a kick from above. Tsuna, watching all of this coolly, instantly brought up his arms to block. A satisfied smirk slipped onto the blonde's lips, glad that the brunet was able to block something as simple as that, but it didn't last long as he went to strike again. As the two fought each other, exchanging blows, Tsuna continued to remain calm with his eyes never leaving the blonde's form at all, observing every movement. Sometime during the fight, they had thrown away their jackets and anything else that was unnecessary to the side. And as the fight dragged on, he noticed Colonello's clothes were beginning to hug closely to the skin as if it was a part of it.

Halfway into it, Tsuna managed to snag Colonello's bandana while doing a flip in the air and sometime after, the other landed a direct punch into the brunet's stomach.

They were lost in their own world as they continued to battle, however, they were still aware of their surroundings.

But near the end, Tsuna made a single slip up, giving Colonello the opportunity he needed to grab the Vongola boss' shirt, grasping the collar, and threw him straight to the ground. A shocked cry escaped from the younger man's lips and then grunted when his back met the soil painfully. His orange eyes locked onto the baby blue orbs, his breathing deep and heavy.

They stared at each other, wondering what the other was going to do next, when Colonello suddenly leaned over, a smirk on his lips, and collapsed onto the ground, spreading out next to Tsuna. Running a hand through his wet bangs, he sighed, staring up into the sky. Colonello wasn't exhausted, he could have very well gone on much longer but had decided not to. Still, he had to admit that Tsuna was much stronger than before and if he hadn't taken advantage of that slip, they would have been still fighting right now. Taking a deep breath, he allowed the sun to warm his sweaty body as he tried to calm himself down. Tsuna, on the other hand, didn't move from his spot, too tired to do so and closed his eyes, the orange flame disappearing.

"Not bad, kora." Colonello stretched his arms, resting and soaking up the heat. "You've improved greatly over the time I've last seen you."

"T-Thanks." Tsuna rolled over to his side, his brown hair sticking to his forehead and the back of his neck. He stayed in that position, studying Colonello from his spot, looking the blond over. The wind that flew by was perfect for drying their sweat-soaked skin but it quickly got chilly after a while even with all the heat that was coming from above. Trying to suppress a shiver, Tsuna wrapped his arms and legs closer, curling up, and hoped that that would work, after all, the sun could only do so much.

Unexpectedly, an arm reached out and dragged the Vongola boss over. Colonello's eyes observed as Tsuna squeaked at the sudden movement but complied, not resisting. Guided by the arm, the brunet rolled right next to the other with his head resting on the shoulder as if it was a pillow. His honey-colored orbs stared at the older man curiously, all a while, with his face blushing darkly. He wasn't exactly sure on what was going on. He had never seen Colonello acting this nice before…it was kinda strange.

"Get some rest. You'll be needing all the strength you can get when we really start so you better take advantage of this break I'm giving you, kora." Colonello closed his eyes, quickly falling asleep just how he used to back when he was a baby. There was a difference though, the man no longer had the bubble and his eyes were actually closed instead of that way they would be creepily open.

Tsuna smiled but the bright red tint on his cheeks didn't die down as he nuzzled closer into the warmth. His finger reached outward, taking hold of Colonello's waist, grabbing the white shirt, and held onto it to keep himself from rotating away. As he closed his eyes, the drainage from the fight was coming back to him (they had been going at it for a good two to three hours straight) and he found himself getting drowsy. Smiling once more, Tsuna took a deep breath and feel asleep on Colonello's shoulder, completely content.

Well there's the first chapter out of four. I'll try to update weekly just hope that school doesn't decide to get in my way.