"Slow has nothing to do with it. Travelling all day for several days when you're not used to it will make you sore, Hokage-sama, unless we slow down to your pace." Itachi dropped the formal lecturing tone to give his cousin a small smile.

"And we're all about ten years younger than you." The smile might have been a little cheeky. Itachi's body might make him feel old most mornings, but Obito was getting old for a ninja.