Hindsight (джен)

The one where Kakashi comes home from a long-term mission, finds little Naruto more or less living on the streets, and decides that he honestly couldn't care less about the Sandaime's laws saying he isn't allowed within ten feet of his sensei's kid.
And, okay, the decision to illegally adopt Naruto might have been a bit spur-of-the-moment, but Kakashi still maintains it's not his fault that the rest of Konoha's jounin then decided to take Naruto in as their very own mascot.
(A Kakashi-raises-Naruto story.)