When he tries to give back the shirt, washed and folded as well as one would expect from a six-year-old boy, Minato doesn't take it.

"Keep it Kakashi. I have way too many of those."

Kakashi shrugs and does as he's told because it still smells of the forest in autumn, and that's a smell he'll savor forever (though Konoha's forests are not the same).

His sensei smells of autumn too, and each time Kakashi thinks it, he blushes and says nothing when Minato questions him. He smells of the sweetness of falling leaves and the freshness of a crisp, gusting wind.

It's their smell, and Kakashi takes comfort in the knowledge that no one can take it from them, because the forest is burned to the ground within the first year of the war.