" Smile.... it will either warm their heart or piss them off..... either way, you win!"
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In every meeting that Tsuna went to, he will always smile no matter how annoying or irritating the others were.

Even Yamamoto -the one who always smiled until Gokudera would call him smiling-freak- would get annoyed and frown sometimes when he followed Tsuna to one of his meetings.

One day, in one of the days where all of Tsuna's guardians went with Tsuna to a meeting, one of the people in the meeting started to annoy everyone. And when I mean everyone, I mean every one of the people who attended the meeting.

Except for one person. The Vongola Decimo himself. While others were trying their damn hardest to not maim or even kill the man, Tsuna only sat there with a smile on his face, never wavering.

The man who was starting to grate on everyone's nerves only kept on going, grating their nerves even further. Until, "I think you have said enough, Don Parlare." Tsuna interrupted with a smile. The said don stopped talking, much to everyone's relief, and looked at Tsuna.

Still smiling, he questioned the don when he continued to stare at him. "Is there something wrong, Don Parlare?"

The said don stared until his eyes were filled with irritation. "Excuse me for my rudeness, Vongola Decimo, but why are you smiling?" the don asked.

Tsuna, still smiling, only tilted his head to the side. "Why, whatever do you mean, Don Parlare?" he asked back.

The don only scoffed. "Excuse my rudeness but your smile irritates me," he answered. The don's statement angered almost all of the occupants available in the room, especially Tsuna's guardians.

But before they could do anything, Tsuna's chuckle stopped them. Everyone focused their attention to the brunet who was chuckling. Noticing their gazes, Tsuna coughed a little before straightening up.

"I'm sorry but your statement had amused me." Tsuna answered. This caused everyone to raise an eyebrow. "Amused? What do you mean, Decimo? Are you mocking me?" Don Parlare asked with a fisted hand. Tsuna let out a little chuckle before answering. "Oh, no. I did not mean to mock you. But I find it amusing when your earlier actions had brought the same discomfort as how my smile did to you." Tsuna said.

That shut the don's mouth for the rest of the meeting. After the meeting had ended and all the other dons had left, the guardians gathered around their boss. One thing played in their minds.

"Haha, Tsuna! Why are you smiling?" Yamamoto asked. Gokudera scowled but did nothing since he also had the same question.

Tsuna stared at his guardians before his smile gets even wider(is that even possible?). He leaned back into his chair, trying to get into a comfortable position after sitting stiffly for so long. "Well, I learned this while I was doing the Decimo training," he paused for awhile.

"In one of the many meetings I attended while training, I found out that I always have to keep smiling. Why? Because smiling can either warm their heart or piss them off. Well, either way, it's my win." Tsuna continued with a shrug.

Everyone only stared at Tsuna. Even Reborn who slipped into the room not a long time ago. One thing crossed their mind. "Was Tsuna/Jyuudaime/bossu/Tsuna-nii/Omnivore /Sawada/Tsunayoshi/Dame-Tsuna this smart?"

Tsuna pouted at his guardians and advisor. "Did you guys just thought of something negative about me?" he asked to which they immediately denied.

Not fully believing, Tsuna only eyed them suspiciously. It was in one of these moments that they became fully synchronized. "Damn that hyper intuition." They thought.