Summary: Sawada Tsunayoshi, the Decimo of Vongola, at the age of 26, died. His guardians? Broken, saddened by the thought they couldn't protect the one that meant the world to them. What do they do?/ "... Byakuran, do it."

Prologue - The Beginning of Their Despair

Sawada Tsunayoshi, the Decimo of Vongola, at the age of 26, is severely sick. Well, so are the other Tri-Ni-Sette holders. For some reason, the three holders of the Tri-Ne-Sette have fallen ill with the same unknown illness, and Tsuna is getting the worst of it. Reason being for Tsuna getting the worst of it? It's because at the same time he got sick, he was trying to recover from a bullet wound to his side. With his weakened state, he got ill faster and the sickness spread throughout him faster.

Tsuna, now laying in bed, began coughing harshly.

"Juudiame!" Hayato, Tsuna's guardian of Storm and his right-hand man, ran over to where Tsuna laid in his bed. The other guardians tensed, all worried for their boss who laid unconscious in bed. They met up in Tsuna's room to check on his condition and to try and figure a way to stop the illness from proceeding any further.

"We need to hurry up and figure something out. Maybe there is a cure? How are Byakuran and Yuni's side doing?" Takeshi, Tsuna's Rain guardian and left-hand man, turned to Kyoya, the Cloud guardian, who shook his head.

"We have nothing so far. If mini omnivore and white carnivore don't hurry up and figure something out soon though, I will bite them to death." Kyoya growled. "We also still have nothing so far. The doctor herbivore is still trying."

"Damn it." Takeshi looked down. Mukuro and Chrome, Tsuna's Mist guardians, looked at each other, communicating through telepathy. Ryohei, Tsuna's Sun guardian, was looking through medical records that laid on Tsuna's desk in his room.

"Nothing is extremely showing up." Ryohei looked up, clearly in distress for his younger brother.

"Tsuna-nii..." Lambo, Tsuna's Lightning guardian, looked at his older brother from where he sat at the edge of the bed. The teen moved a little closer and placed his hand gently onto Tsuna's head, resulting in taking his hand back from the head radiating from the adult.

"Tch. There must be something out there." Reborn finally spoke up from his spot in the corner of the room. Seeing as the curse was finally broken, he was now back into his adult body.

"Bossu..." Chrome looked over towards her boss in worry.

"Kufufufufu..."

"Are you sure the Decimo is weak right now?" A darkened silhouette looked over towards a bowing man.

"Yes, he can't even leave his bed now without collapsing." The man replied, a dark grin appearing on the silhouette.

"You've done me good, Edmond. Now, go back before they get suspicious of you." The silhouette said, motioning for the man to leave. "After all, we wouldn't want you to lose your reward, yes?"

"Yes sir." The man bowed again and left, greedily taking the big suitcase of money from the silhouette's subordinate.

"Watch out, Decimo. You won't be suffering for much longer..." The silhouette laughed.

"Are you sure Tsuna?" Reborn asked his student, who was now awake and sitting up in bed.

"Yes, I'm sure I want to see Byakuran and Yuni. It's just to check up on how they're doing." Tsuna smiled. Reborn sighed and motioned for a butler to come over.

"Tell the guardians to come here." Reborn told the butler, who nodded and left the room. "And you, get more rest. Build up your strength, after all, we need you to get better soon." Reborn whipped around to face his student again, who gave him a weak smile.

"I know, I know." Tsuna coughed a little. "What kind of boss would I be if I just left my Family in the middle of a mafia war?" Tsuna laid down and Reborn resisted the urge to slap his student.

"A terrible one." Reborn replied and Tsuna chuckled, slowly falling into the blissful black.

"So he wants us to get Yuni and the white haired bastard for him?" Hayato raised his brow from where he sat in Tsuna's room.

"Yeah." Reborn confirmed. "And besides, we're running out of medicine, correct?" Reborn looked at Ryohei who nodded.

"Let's do this. I will take Hayato and Takeshi to go retrieve Byakuran while Mukuro, Kyoya, and Lambo go retrieve Yuni. Ryohei, you and Chrome will go get the medicine. Don't worry, Tsuna will still be well protected by the staff." Reborn looked at the guardians, who nodded.

"Alright. Let's get this over with and return as quickly as possible." They all nodded and left.

Outside the door of the room though, stood a butler who had listened to the whole thing. No, not a butler, but the rat Edmond, who had a sadistic grin on his face. He walked away quickly before anyone could notice.

Tsuna woke up around an hour after everyone left. Looking at the note at his bedside, he smiled.

Don't worry Tsuna, your guardians and I are just doing a few errands.

-Reborn

JUUDIAME! DON'T WORRY! WE'LL BE BACK AS QUICKLY AS POSSIBLE!

-Hayato

Hahaha, hope you're feeling better by the time we get back.

-Takeshi

Nii-san! When we get back, can you tell me how to make those origami things?

-Lambo

You'll feel EXTREMELY better by the time we get back!

-Ryohei

Hn, we'll be back soon Omnivore. Don't drop dead or I'll bite you to death.

-Kyoya

We'll be back soon, bossu.

-Chrome

Kufufufufu, just be patient dear Tsunayoshi. We promise to be back soon.

-Mukuro

Sighing at Reborn and his guardians' antics, Tsuna shook his head. "I'll be waiting." Tsuna promised, wondering how they're doing at finding Byakuran and Yuni. Byakuran like to run around and ruin many people's lives, so he's who knows where. Yuni, on the other hand, is quite easier to find, it's just Gamma they have to pass through to get to the little girl.

"You can come out now." Tsuna opened his eyes, revealing his honey-brown eyes that had a tint of golden amber in them. Edmond walked out from the shadows in one of the corners in Tsuna's bedroom. Tsuna raised his brow and looked at Edmond closely, noting he was no longer wearing the normal butler attire, but instead a suit with the crest of the Eresia* famiglia. The very same mafia famiglia that Vongola was at war with currently.

"Decimo." Edmond spoke coldly with no emotion and Tsuna smiled.

"Ah, Edmond, what gives me the honor?" Tsuna replied, his voice light, but at the same time, weak.

"It is your time, Decimo." Edmond stepped forward, pulling a gun out. Tsuna just tsked and shook his head.

"I'm afraid I can't go just yet. You see, I've made a promise with my friends to survive through this." Tsuna opened his eyes, which were now a full amber.

Edmond began to cackle as the bedroom doors opened, showing the don of the Eresia famiglia. "Decimo!" The silhouette turned man boomed. "How are you feeling? Is that sickness too much for you to handle?" Tsuna stiffened, his eyes narrowing at the don. But the don ignored it, "Or is it too much? Ah! Is the bullet wound fully healed yet? I'm very sorry about that." The don added the last part sarcastically.

"What are you implying?" Tsuna growled at the don, who looked hurt.

"You haven't figured it out yet? With the help of my wonderful scientists, I was able to make a beautiful poison. But what I am really applauding is the work of my rats. Do you understand how hard it is to apply poison to a ring and pacifier that is always worn 24/7? It is very hard." The don's face broke into a sadistic look when he saw Tsuna's surprise.

"When...?" Tsuna looked into the don's eyes.

"Well, it takes a while for the poison to seep into your skin, so I believe you have been in contact with the poison for a few weeks or so. Possibly months." The don shrugged, walking over and sitting at the foot of Tsuna's bed. Due to the sudden shift in weight on the bed, Tsuna's cough began to act up, making the 26 year old break out into a harsh coughing fit.

Edmond raised his gun, but didn't shoot because his boss raised his hand up. "Listen well, Decimo. Vongola will fall, and you will be the first."

Tsuna glared at the don and clutched the note in his hand.

The ringing of the gun echoed throughout the mansion.

Ryohei and Chrome were the first to return.

They couldn't believe what they were seeing, dropping everything in their hands and their mouths were hanging open, despair filling their eyes.

Laying on the bloodstained bed, was their beloved boss and family member. His skin paler than it was when they left, and in his hand was the note they left behind, on the back in blood and in Tsuna's handwriting were the words I promise.

Ryohei instantly ran to his side to see if he was miraculously still alive.

When Chrome saw Ryohei's face when he checked Tsuna's pulse, she fell to her knees, tears falling uncontrollably.

Mukuro, Kyoya, Lambo, and Yuni were next.

Mukuro sensed something was wrong on the other side of the closed mahogany doors and pulled his trident out. Kyoya pulled out his tonfas and Lambo stood in front of Yuni.

What they saw on the other side of the door, wasn't what they expected. Or wanted.

On the floor was Chrome crying and at the bedside was Ryohei trying to do whatever he could do to save the person on the bloodstained bed. The person on the bloodstained bed, their precious person, had already stopped breathing.

Kyoya and Mukuro dropped their weapons, Kyoya leaving the room and Mukuro going over to Chrome to try and calm her down. Lambo burst into tears and Yuni hugged him, trying to calm him down as well.

There was another note by Tsuna, and when Yuni looked at it, she knew what would happen in the future, even without her visions.

Tears escaped her eyes as she wished her sky brother a peaceful trip to the afterlife, wishing him an afterlife of no pain.

Finally, Reborn, Hayato, Takeshi, and Byakuran arrived.

In almost an instant, after they entered the mansion, Byakuran's eyes widened and he pushed past the other three, running towards Tsuna's bedroom in a hurry. He didn't even care if the others were yelling at him, the moment he entered the room, he ran over to the bed and Yuni jumped into his arms.

Hayato entered the room first, and in that same instant, fell to his knees.

Takeshi followed next, the moment his eyes hit the bed, he froze.

It was when Reborn entered the room though, that everything fell. "What the fuck happened?" Reborn glared at the butler that stood in the doorway.

"I am so very sorry, it was Edmond's turn to watch the Decimo, but we do not where he vanished to." The butler bowed, tears threatening to fall.

"DAMNIT! If only we had been quicker, if only we had not all left..." Hayato punched the floor over and over, until Takeshi tried to stop him, tears falling from his eyes as well.

"I believe we've found our culprit." Byakuran muttered darkly, studying the note Yuni handed him when she calmed down. Reborn marched over and tore the note from Byakuran's hands.

I don't know how much time I have left to write this, they just shot me and left. Luckily this pen and paper were nearby... whoever is reading this, I have a new revelation, though it may be too late.

We were poisoned.

Somehow, the Eresia famiglia made a poison and administered it to mine and Byakuran's rings, as well as Yuni's pacifier. They wanted the Tri-Ni-Sette to fall with Vongola, but judging by how he acted, there is some form of cure that could be made. Apparently the poison was made to seep into the victim's skin, going into the bloodstream from there.

Also, one of my head butlers, Edmond, is apart of the Eresia famiglia.

I'm sorry I broke my promise.

-Tsun

The name wasn't finished. Reborn was fuming, along with the guardians and the sky siblings.

"Those bastards..." Hayato muttered darkly, the tears still falling. "They dared touch Juudiame when he was his weakest and unprotected."

Yuni looked at the guardians broken forms(Kyoya had returned into the room as the note was being read) and noticed how they all now held almost no light in their eyes. Even Reborn looked somewhat broken. Looking up at Byakuran, she tugged onto his shirt and whispered into his ear, earning a small gasp from Byakuran.

"Are you sure? They may not agree." Byakuran warned the small sky. That caught everyone's attention.

"What is it?" Takeshi asked and Byakuran looked up at them.

"Well, there is a small chance I can allow you to go back and protect Tsunayoshi-kun, but you'll be in a parallel world. Meaning it won't be the same Tsunayoshi-kun." Byakuran took in their looks. "It will also take some time for me to prepare to send all of us to that parallel world."

"That would be enough time to administer punishment onto the Eresia famiglia." Yuni added in and everyone looked at the two with determined eyes.

"We accept."

"Okay, everybody set?" Byakuran asked from where he sat in his wheelchair. It has been a few months since Tsuna's death and they had finally eradicated the Eresia famiglia. They even created the cure to the poison, which had been applied to Yuni and Byakuran a couple weeks back.

They all nodded and Byakuran smiled, "Good. See you on the flip side. Yuni, Spanner, Irie, if you would." With another nod, the three flipped a switch and everything turned black.

Reborn opened his eyes, and looking down, he saw the familiar form of his arcobaleno form, pacifier and all.

"You've finally woken up I see." Looking over, Reborn saw the Vongola Nono, Timoteo. "I almost thought the greatest hitman died. I have a favor to ask." The old man looked at Reborn in the eyes.

"What is it, Nono?" Reborn asked in his squeaky voice.

"Train the future Decimo Sawada Natsu." Reborn inwardly froze, but on the outside stayed emotionless.

"I accept." I'll be there soon, Tsuna.

BAM! Prologue done! I hope you enjoyed the chapter.

*Eresia is Italian for heresy

:)

Next Chapter: The Rain, The Cloud, and The Sun's Rude Awakening.