Naruto: I’m a Sage, and I Adopted Naruto

The seal on the third immortal is broken when two tomb raiders dig him up, on the very night of the Nine-Tails' rampage.

Could the Nine-Tails wreaking havoc in Konoha really be the third immortal's pet?

Realizing that his brother Asura has merged with Naruto's body, Kakaro unhesitatingly adopts Naruto, now an orphan.