Naruto FanFic story
Doing it Backwards
written by
hands_off
http://archiveofourown.org/works/11374368/chapters/25465515
the tattoo is a little more elaborate than the one the author described in the story
Doing it Backwards written by: hands_off
Quote --- It was a large swirling mass of blue and black ink. As Kakashi looked further, it seemed to be a dragon that started up near his shoulders and gracefully trailed its way down the length of his back. There was a long, raised pink scar across the middle of the dragon, probably from Mizuki-sensei’s attack (of which Naruto and Iruka were the most awesome duo that saved the day in the most heroic way possible). ---end quote