When the Curse is broken Skull watches the aging of his body with awe.

He hadn't seen his body age since that time hundreds of thousands of millions of years ago when his body just stopped at age 23.

Skull knows he owes the breaking of his curse to Tsunayoshi Sawada.

He knows that the only reason he is watching his body age up for the first time in ages is due to Tsunayoshi declaring 'No More' in the face of a system everyone had thought impossible to break or replace.

Skull had watched the Tenth Generation of Vongola bloom into something glorious from struggles and blood spilled and the will to stand up for good. He'd watched it all from the start. He'd found himself attached to them, found himself protective and amused and content to follow behind Tsuna.

Skull had been proud of them, had known Giotto would be proud of his grandson and the family he had built.

But it is in that moment, the moment Skull realizes it is because of Tsuna that he is watching his body age that Skull makes a choice.

He will follow this Sky.

(And as the months go past, Skull never once regrets this choice. He only finds that his loyalty and trust deepen and strengthen.

Half a year after his choice Skull sits Tsuna, his Guardians, and the Arcobaleno down to explain his age and origin.)

(He spends the next couple of months answering the absolute flurry of questions thrown at him from all directions before it slows down to manageable amounts, but never quite manages to stop.)

(He also becomes the only living being with a group photo of the Arcobaleno where every single one of them are wearing shocked expressions in the photo.

He frames a copy and it has a place of honor in his room. Any time the picture 'disappears' he just replaces it.)

(He laughs at the Arcobaleno's struggles to get rid of the photo.

He's pretty sure Tsunayoshi was the one to steal the first copy for himself though.)