3.

It was a routine.

Get up. Get beat up by Reborn. Get beat up by Kyoya. Get beat up by Reborn/a-boss-manipulated-as-foil-for-his-training/Kyoya again. Sleep. Repeat.

There was a lull after Mukuro got his ass hauled into Vindice and little Tsuna, during that period, spent most of his time...training when he wasn't cultivating his feelings with his future minions.

And then-

Hibari Kei happened.

It was a normal day too. Tsuna was comfortably going through the motions - automatically tripping on his feet in order to dodge a tonfa closer than what was necessarily safe for his mind and body when-

As he was about to get bitten to death by Namimori Middle School's fearsome prefect, all hail Hibari Kyoya, a blur suddenly flung itself on the older teen's back with a loud thump and saved his ass.

Tsuna, being the very good boy that he was, took a moment to pray for his savior's soul as he pragmatically inched away from the two in order to make a safe retreat. He avoided looking at the elephant in the...school's courtyard - casually moving centimeter by centimeter away from the danger zone, because unlike his fellow late-bivores, Tsuna would like to think that he had a healthy sense of preservation.

He'd rather not get caught in the eventual slaughter, thank you very much. Tsuna got enough shit from his beloved tutor every day so, excuse him, if he'd like to avoid the shitstorm that this one had the potential to be.

That was the plan at least until the sound of tinkling laughter in the silent courtyard reached his ears.

And-

"Kyoya-chan," A voice greeted cheerfully. "I missed you."

Tsuna's brain stopped.