Tsuna stared at the gun in his hand and then at the carnage around him. Takashi lying in front of him; his head two feet away from the rest of his body. Hayato with a stick of unlit dynamite in his hand and another one blown to bits along with his stomach. Kyoya with a tonfa through his throat. Mukuro with his trident piecing his face and into his skull. Ryohei with the bandages usually around his knuckles around his throat instead. He couldn't even see Lambo under all the bodies. And Reborn; Reborn whose gun Tsuna was holding right at the moment; taken when the hitman fell. Whose body lay a couple feet away with a bullet hole in his forehead. Tsuna looked at the gun in his hand again.

'I regret hurting everyone.'

He placed the gun against his head.

'I regret following tradition and not doing things my way.'

He shut his eyes.

'I regret making people suffer.'

He swallowed.

'I regret.'

He pulled the trigger.

XXX

Tsuna pulled himself to a sitting position in the middle of a field. He took a minute to shut his eyes and dragged air back into his lungs. Once he was breathing relatively normally he opened his eyes again. Yep…he was in the middle of a field. After he really started looking around he recognised it. Once he could clear his mind of the bodies and blood he noticed that this was the same field of the battle. Just with no dead bodies, no dead guardians.

He jumped to his feet and then fell to his knees with a groan. It felt like someone had split his head in half with a pickaxe; like they had done to Iemitsu. He dragged in his breath again and held it. After 10 seconds he let it out in a rush. Instead of standing he knelt back to investigate things.

It was the same field that they had been fighting in. Off to the side was a tree that had been burnt to the ground but was standing tall now. Next he looked down at himself; his hands were small, and soft. They didn't have the calluses he was used to. Jeans and a t-shirt; he wasn't standing but he could tell he was shorter.

Tsuna took a deep breath and tried not to panic. He put his head between his knees and just breathed. Once his stomach had settled down he attempted standing again. This time he managed, though his legs were a bit shaky.

'It worked,' he thought in disbelief.

He hadn't actually expected it to. The Decimo had thought; surrounded by all that death, all those regrets swirling inside of him and Reborn's pacifier in one hand and gun in the other. He had been half sure that the dying will bullet he sent into his brain was going to kill him. Instead it had sent him into the past; a half-baked idea Tsuna had come up with on the spot after watching everyone he knew die.

The boy looked around the field and grinned. He would get it right this time; would change things and make them better. First he had to get home though. It was a good thing the fight had taken place outside of Namimori, he didn't know what would have happened if it had been in Italy, and it was nighttime. He could make it home without Mama noticing he was missing.

Tsuna took three steps and fell flat on his face. That wasn't because of his weak legs though; that was because he tripped over a rock. Three minutes later he tripped again and cursed. The boy had forgotten how clumsy he was before Reborn had showed up. He made it home, with minimal injuries and snuck into his room. This required him being very, very, careful so he wouldn't trip and wake his mama. Once he slipped inside and tripped over a book, he held back a yelp, he turned to look at the calendar. According to it, he was here three years before Reborn. That should give him enough time to get his roots planted.

XXX

The next day, it was a weekend thank god, he didn't have to go to school. He wandered into the kitchen to eat breakfast and spent, probably more time then he should have, staring at his mother.

"What is it Tsuna?" she asked with a smile when she noticed.

"Nothing Mama," he replied softly. "I was just thinking that you are the best mother ever."

Her body had been shipped back to them in a box which said enough on its own. Nana giggled and then Tsuna decided to spend the first half of the day with her; helping her clean the kitchen and doing laundry. It was nice just to be around her and he basked in her warmth; taking the advantage of hugs whenever he could. The boy knew his mother was startled so he told her he had a nightmare and she let it go.

After lunch he went up to his room; knowing it wouldn't be odd for him to do that. His younger self had been happy to spend all day in his room with games and manga after all. Instead of those though he grabbed his laptop and settled on his bed with it. It was time to start planting seeds.

The first email he sent was to Hayato. Tsuna was rather grateful to Spanner and Shoichi for the hacking skills they had taught him. He took several back allies and hacked into several websites before finally sending the email. He wanted it to be as untraceable as possible.

Tsuna's first step was helping his friends because there was no way he was going to let them be hurt if he could help it.

Smoking Bomb

I want to hire you for a job. I have a retrieval mission that I need two people for. Your part would be blowing several holes in the walls of the building I am looking to break into. I will have someone else that will go in to retrieve what I desire. Email back if interested.

That step done he sat back to think. He needed someone to break in and rescue the children but who should he hire for that? He needed someone strong, capable and subtle. He cast his mind back through the many assassins and hitman he knew. Reborn was out of the question as he wasn't going anywhere near the hitman yet. He crossed Skull off the list as well for being too noticeable and dramatic. There were not many others that he trusted until he came to Fon. The martial artist was quiet and skilled. He wasn't sure what he was doing around this time but the man liked children which made him a better choice than any of the others. This time he thanked Reborn for making him memorize the contact information for the rest of the Arcobaleno.

Fon

I would like to hire you for a retrieval job. I have someone who will blow open several walls in a building which will serve as an opening and distraction. You will go in and retrieve the children locked inside. Email back if interested and I will provide more information.

At the bottom of both emails he stated how much he would be paying them and then smiled. There, that was the next step done. He wasn't sure if he should have mentioned the children to Fon but he hoped it might help catch the other's attention since he liked kids. Hopefully, with their help, he would be able to free Mukuro from the Estraneo family early. All he could do now was wait.

He glanced around the room, checked the time, and yawned. Tsuna thought for a moment about what he wanted to do and decided on sleeping. He was tired from the walk back and would need his energy tonight.

XXX

Now for the real test. Tsuna stood at his window and looked at the tree outside.

'This could get me killed,' he thought as he slowly grabbed onto the branch to transfer his weight over.

Very, very, carefully he climbed from his window to the ground via the tree and almost let loose a whoop of delight upon surviving. He didn't, because that would have ruined the sneaking out, but he wanted to. The boy glanced at his watch and then set out.

A ten minute walk found him at the edge of the woods. It was time he started training his body but he needed to do so without drawing attention, hence the forest. He hefted the small backpack he brought with him and started hiking. His goal was to travel the through the wood to gain stamina and increase his agility by learning how to manoeuvre around trees and rocks without falling on his face. Ten minutes in he was out of breath and had cut open one of his knees on a sharp rock; the boy pulled himself back to his feet and started walking again. He had a lot of work cut out for him.

XXX

The next day was a Monday. Any other student might be worried but Tsuna wasn't. He could just sleep in class and the best thing was no one would care since he was always doing it anyway. This actually worked in his favor since he needed to keep up appearances; people needed to see Dame Tsuna so they wouldn't ask unnecessary questions. Being at school offered him quite a lot of useful things. He could re-gain energy from his nightly excursions and see Takeshi and Kyoya.

He wasn't going to go anywhere near Kyoya yet; he needed to be able to gain the prefect's interest and keep it as well before he dared to talk to him. He would also need some fighting knowledge before starting anything so that he lived through their encounters.

Tsuna could start working on Takeshi's friendship though. Hopefully he could head off the suicide attempt before the boy even could even try it. The problem was that he couldn't just start being friends with him. For one thing it would be weird if he suddenly developed an interest in the star, and the baseball team would probably beat him up. He figured out an idea at the end of gym when the teacher paired Takeshi and another kid up for cleaning the building.

Tsuna took a breath before slowly walking over to the other kid. It was one of his bullies and he made a point of tripping once he was close enough.

"Oh look its Dame Tsuna," one of the jerk's friends sneered.

Tsuna looked up at them wide eyed and tried to edge around them, purposely tripping again. He felt one of them grab onto his shirt and he shut his eyes tightly.

"I'm sorry," he said quickly. "My…my Mom w-wants me h-home soon."

"Well that's too bad," one of them smirked. "I don't feel like cleaning the gym today so you're going to do it."

"But…b-but," Tsuna made a show of trying to protest only for the boy to shove him to the ground.

He stayed there for a minute so he could hide his smile before standing. It had all gone according to plan. It was quiet for a bit as he and Takeshi cleaned before Tsuna spoke up.

"H-hey Yamamoto," he said while trying to keep that shy tone in his voice.

"Oh hey, you're Tsuna," the other boy responded a bit surprised even though they had been cleaning together for five minutes already.

Tsuna withheld a sigh; he had forgotten how oblivious Takeshi was when he was younger.

"What's up?"

The young boy paused in his sweeping to bite his lip before looking at him shyly.

"Why do you like baseball so much?" he asked.

Just as he'd expected Takeshi's eyes lit as he started raving about his favorite sport. Tsuna listened as he talked and made the occasionally quiet comment. There were a lot of hand motions and sound effects which made him laugh and he found it was actually a bit relaxing just to listen to the baseball player rave. There were not that many quiet moments once he gained all his guardians after all.

It seemed like it was too soon that they had finished cleaning and Tsuna sighed as he waved bye and started to walk home.

"Hey," Tsuna glanced up at Takeshi's voice. "You're a good listener," the boy grinned. "See you later."

Tsuna smiled back. Hopefully it wouldn't take too long to wipe the fake look off his soon to be friend's face. He much preferred the genuine one he had just received.

XXX

His days soon fell into a pattern; he went out at night to work on his endurance and dexterity and then kept his head down in class, usually by sleeping. On days where Takeshi had cleaning duty Tsuna would manipulate things so he would end up there too and then would spend the time listening to the boy talk. Topics were usually on baseball but sometimes Takeshi would change it up and talk about his dad and sushi or how he didn't understand any of the work in classes. Those moments of conversation with his friend were the bright spots of his day and during those times he could forget about the blood and bodies for a little while.

XXX

One night he was going through his emails and froze when he saw there was two new ones.

I'm interested and would like more details.

Tsuna grinned as he read it. He could just picture Hayato being so excited that someone wanted to use his skills but trying to sound professional and not needy in his email. He moved his eyes to the second email from Fon.

It is not often I am hired for jobs like this one. However I would be interested in assisting depending on further information you can give me and I would like to know the name of the person hiring me.

That was good enough for him. The boy knew he couldn't give out his real name but he also hadn't thought of a good pen name either. He did a quick google search and decided on Yoki. It was a female North American name that meant rain. Using a name that had a flame in it would suggest he knew about them but since it was female and not Japanese it should give some false leads if Fon tried to find him. Plus it alluded to him being a rain and not a sky which was a bonus.

Smoking Bomb

It has come to my attention that the Estraneo Famiglia has been experimenting on children. That is not acceptable and I want them freed. Your job will be to blow several holes in the walls of the building. These will serve as an opening for my second man to get inside and will also provide a distraction.

Yoki

Fon

It has come to my attention that the Estraneo Famiglia has been experimenting on children. This is not something I will accept or allow to continue. I have someone who will blow up several holes in the walls which will provide an opening for you to get inside as well as a distraction. I will leave what happens to the guards to your discretion. As for my name; you may call me Yoki.

In all honesty he would prefer if the scientists were killed but he decided to leave it to Fon to decide. Hopefully the Arcobaleno would appreciate being given the choice.

XXXXX

AN: I do not own Katekyou Hitman Reborn. So I know the whole time travel thing has been used fifty million times but I still wanted to write my own. Hopefully this is different from all the others out there. Let me know what you think; I love to hear people's opinions. Especially on the characters and whether they are OOC or not. This is my first time writing for this fandom, I'm not counting Harry Potter and the Tutor from Hell, so I'm a little nervous.