Disclaimer: Amano Akira-san owned Katekyoushi Hitman Reborn, not me.

Title: A mission to retrieve the Black Swan.

Synopsis: The Vongola was assigned with the most important and dangerous mission, that is to retrieve the Black Swan. Thus, the Ninth gave this mission to the Vongola Decimo and his strongest Guardian, the Cloud Guardian. This is the story of trust and fear. "Be careful, the Devil can read your fear." This is set 10 years in the future.

Chapter 1: The Mission.

"Tsuna, we're going to have meeting in the afternoon at the Hall. Prepare to tell every guardian," Reborn simply stated as he entered Tsuna's bedroom. Tsuna, who had just woken up, stared at the serious-looking Reborn and fell in silence.

"Reborn, what did you just say?" Tsuna asked innocently, scratching his head even though it was not itchy.

"I said gather your guardians in the afternoon at the Hall," Reborn repeated and walked out of the room.

"Why? He usually smack me or hit me with Leon...that's weird..," Tsuna stated and lay on his bed. 'I'll just wait for 5 minutes more...'

3 hours later...

"Tsuna...wake up!" with that a humungous hammer hit Tsuna's torso.

"ITAI! Reborn?" Tsuna shrieked as he sat up straight, rubbing his torso. "Seriously, why did you do that for?" he continued.

Reborn tilted his fedora, hiding his eyes and said, "The Ninth is waiting."

"So, how's your day, Tsuna (I don't know what Ninth call Tsuna)?" the Ninth asked. Tsuna who was just having an extremely cold-shower and fast change of clothes sat beside the Ninth. His face was unusually pale due to the cold shower.

"Em...Very productive?" Tsuna replied, thinking what would be the Ninth's reaction when he knows Tsuna spent his day just now sleeping. It was not his fault! Reborn forced him to finish signing and reading millions of documents last night, worse, with a death threat!

"That's good...," the Ninth remarked and stood up. He let his eyes wander at every guardian that was present in the room, stared at the Cloud Guardian for a couple of second and finally at Tsuna who looked at him with a worried face.

"Ninth...is something troubling you?" Tsuna asked out of blue which taken the Ninth by surprise.

"Oh, no...unfortunately...yes," the Ninth sighed. All of a sudden, everyone attention were on the Ninth.

"What is it?" Tsuna asked. He could feel his heart thumping wildly against his ribcage and feared it might as well burst. Really, stop with the suspense and just straight to the point already!

As if sensing Tsuna's impatient and anxiety, the Ninth quickly announced, "The Vongola is assigned with the most important and dangerous mission, that is to retrieve the Black Swan. I'll give this mission to the Vongola Decimo and his strongest Guardian, the Cloud Guardian."