Katekyo Hitman Reborn belongs to Amano Akira.

Author's note

I don't know what to say about this chapter. I thought about telling the whole truth in this but then the interaction with the guardians will be too brief. Even so I'm sure all of you will not be satisfied with this because of all the unanswered questions. But it has been so long so I'll just post this for now. Enjoy!

"Tell me who the child is, Tsuna." Reborn started as soon as Tsuna entered through the door. His voice was clear and demanding. He would not wait for another second. His head was tilted and half his face was covered by the shadow casted by his fedora. His onyx eyes glinted dangerously in the darkness of the shadow with anticipation for the answer to his question. He was not giving any leeway for Tsuna to run away nor was he having any mercy to let Tsuna avoid the question.

"You could have at least waited for me to have a seat, Reborn." Tsuna sighed in exasperation. Reborn so needs to learn some patience, she thought.

As exhausted as she was in the situation at hand, she could not turn a blind eye at this. They needed to know who the child is. At least she can avoid some situations that might involve with some strangling to death or accidentally falling down from third floor or maybe even mysteriously missing in the dead of the night. And all those accidents may revolve around a single tiny dark-haired boy at the age of 5.

Tsuna strode lightly to the seat at head of the table. Gokudera followed silently behind her. He pulled the chair outward to let Tsuna moved in and courteously pushed the chair in as Tsuna smoothed her cape behind her back before sitting. Having seen Tsuna being comfortable, he took his leave and sat at the right side of Tsuna.

As always, the seating arrangements remain unchanged even after 10 years. At the right side of Tsuna were Gokudera, followed by Ryohei and Hibari. At Tsuna's left side sat Yamamoto, Lambo, Mukuro and ended with Chrome. Reborn sat at the opposite end of Tsuna at most time. But there was time where he just stood near the door or behind Tsuna overlooking their meeting sessions. But at the very moment, Reborn was sitting at the end while looking very dangerously passive at Tsuna.

Even though Tsuna had become the don since 18 years old, she felt small sitting at the head with all her guardians' eyes fixed on her. The questioning gazes were not camouflaged and clearly stated what they wanted to know. What had happened and who is the boy?

"Um…" Tsuna stammered under their heating gazes. She was fiddling with her fingers under the table to lessen her nervousness. It had been so long since she last sat at the head and had all this attention to her. What had happened was ridiculous and she was not sure if they would believe her or not because it was too outrageous.

"A don don't stammer, Tsuna." Reborn reprimanded. "And also, we haven't got all the time in the world. So spill it." He continued impatiently. His patience had reached its limit with Tsuna dilly dallying on her explanation.

"You are too timid to be a don, Tsuna. It's a wonder how you are able to lead the Vongola."

Tsuna took a deep breath, bracing herself for what to come. He was right, she thought. This couldn't go on forever. Tsuna looked at all her guardians one by one.

Gokudera was focused the entire time and his face was pulled in a tight frown. His mouth had already smoked half a box. Yamamoto was serious too. Unmistakably smiling but his eyes didn't have that glint of mischievousness. He was just being patient. Lambo was eating his candy away with every minute passed by and almost ran out of the meeting hall because of the heavy mood. Ryohei was silent for once and Hibari was obediently sitting next to him without having the urge to bite someone. Chrome was silently watching the conversation passing between Tsuna and Reborn. And Mukuro, who was involved in the skirmish of the battle with Byakuran himself and not the teen him was smiling the knowing smile. Tsuna was hoping that he did not know the actual truth of the story.

"How about you tell me what you want to know first?" Tsuna gave them the option to ask. She was having a hard time to decide what to tell first and the silent had been going on for too long.

Reborn felt disappointed with Tsuna's indecisiveness. What was it that made Tsuna so hard to be the don he had envisioned since long ago? But even so, she was the one he had been sticking to; the one he had admitted to be his one and only master. Reborn coughed into his hand out loud to attract the attention to himself. This is going nowhere, he thought.

"Who is the little boy?" He went straight to the one question they all had in mind. All the guardians straighten to attention. They were anxious but they needed to know. They had to know. The boy was connected to Tsuna. That was for sure.

All the guardians had been holding themselves back from asking the questions directly. All except for Hibari and Mukuro. Both of them just did not care enough and as for Mukuro well, he has his own way of knowing things.

Tsuna stopped fiddling with her fingers. Her eyebrows knitted to a frown. She pressed her lips to a straight line. Then slowly she said, "…he…"

"I wish you the best of luck, Tsuna. Take care of yourself. Caelum needs you. Remember, I always love you."

"He was with me during my trip to the past. Approximately 400 years ago, during the majestic era of the First Generation of Vongola where Primo and his guardian reigned in power."

"I will miss you, Giotto."

"Mom?"

Caelum's eyes slowly fluttered open to the darkness of the night. He brought his hand to his eyes to rub off his sleepiness. He looked to his right and left to find the room void of his mom's presence.

"Mom?" he called again in whisper. Somehow he became cautious of the unknown residing in the dark. Slowly he brought down his leg from the bed to the warm carpeted floor. One leg. Then two leg. His feet were dangling in the air so he had to slowly push himself down to avoid falling face first. He wasn't clumsy like his mother but he wasn't sure why he was not tall like his father. With small cautious steps, he walked to the door and tip toeing to grab the knob. Bless his height.

He peeked at the small gap he made and scanned the outside. The hallway was silent and empty. He opened the door further and trotted to the end of the hallway where there laid a large staircase. He looked to his behind in case his mom came back for him from nowhere but there was no mom. He slowly descended the staircase. One by one while holding the railing.

Arriving at the end of the step, he looked over behind the staircase to find a large mahogany door at the centre of the room. He heard soft mumbling from behind the door and became curious. He put his ear to the door and tried listening. The sound of the voice felt familiar and comforting. Just like his mom. Yes, his mom! Mom is in here.

Before he could push the door open, a man's voice stopped him in his track.

"Does that mean he is someone from the past?"

"It is impossible for another to arrive here except us. It was a miscalculation that Juudaime was brought to the past. But having said that, there is no way for someone from the past to come here. There is no technology for it to happen."

"Then who might he be? Was it perhaps an accident? Maybe he was accidentally brought here together with Tsuna-nii because they were together? Then we can just send him back."

"Herbivore, there is no need to further disrupt the flow of time. There is enough of time paradox as it is."

"But why did he call Boss his 'mom'?"

*CREAK*

All the voice stopped talking instantly. Caelum's weight that had pushed the door without his notice exposed him to the entire room. All his uncles were looking at him with alert eyes, stance ready to fight. Some had even brought out their weapons. The atmosphere was tensed and heavy.

"Um…" his small voice was uncertain as his eyes roamed the big hall from side to side. His head was low, conscious to the unexpected attention he received. Seeing that it was just little him, his uncles slowly relaxed their shoulders and put down their weapons. He was unsure on what to do in situation such as this. He was ready to run when he heard the voice he longed for.

"Caelum." Tsuna called from the table head.

Caelum beamed at his mother's call and ran to her as fast as his leg could carry him. He jumped to his mother's outstretched hands and embraced her tightly as if she would go away if he did not. He nuzzled his face at her nape and smelled the scent of his lovely mother.

"Mom." he mumbled softly. Tsuna just smiled fondly as she rocked him to and fro. He pulled himself away just enough to see his mom's face before bombarding her with questions.

"Where did you go? Why did you leave me? Do you hate me now?"

Tsuna quickly hushed the little boy and soothingly made circle motions behind his back.

"I was just talking to the brothers and sister." Tsuna tried to assure him. He is just too fast at making assumptions. Tsuna had noticed that trait of Caelum which was too similar to her own. Caelum smiled at Tsuna, happy that he was loved. He continued to hug Tsuna without a care. Now that he was with her, Tsuna became more confident, more stronger. Tsuna looked to the group once more. Her eyes blazed with determination. Her eyes lingered at a certain man amongst them. I will protect him. I will protect both of them.

Tsuna let Caelum down. Her hand clasped the boy's hand in a protective manner.

"Reborn…" Tsuna stared at Reborn straight in his onyx eyes. Her stare was hard and relentless. Her voice was low and deep. Deep enough for a girl as sweet and shy as her. Deep enough for the temperature in the room to drop down several degrees below negative. It brought chills down Reborn's spine but surely he would never admit it. He is the strongest hitman. And the strongest hitman does not have chills running down his spine.

Tsuna breathed out a long sigh before taking in a deep breath. She then continued,"…whatever you say, however you say it, even for whatever reason you say it for.." her eyes dropped down to the little child by her side. "…I will never send him to anywhere. He will stay with me."

The child, sensing that Tsuna was talking about him, looked up in response. A familiar pair of onyx eyes clashed with Tsuna's unwavering pair of brown-honeyed eyes. His hand that was held by Tsuna was clenched tighter. She tugged at him lightly and hid him behind her; away from all the eyes that were watching them.

Reborn's eyes twitched in annoyance. This lady is already forgetting who she was talking to. Reborn pulled his fedora further to hide his face. He was annoyed, but he was proud. Tsuna had shown bravery. She had shown determination and resolve. All because of a single mysterious child. Reborn was intrigued.

"Then talk." Reborn probed. He would get his answers now.

"He is my son. 400 years in the past, he was born with the guidance of time and space to be the widest sky, surpassing his mother and his father. He is the rightful heir to the throne of the Vongola. He is Caelum of Vongola. And he is my child by blood."

"400 years in the future, Caelum will face a great danger due to his blood and he will be there to be a shield and to die in his stead. Either one or none at all."

I will protect the both of you.

Anddddd that's all for the day. It's quite long for me this time. I'm sorry for the late update *dogeza* I'll try to write and make it interesting for the next chapter. Next chapter will answer most of your questions. I promised!