My Daughter Left the Nest and Returned an S-Rank Adventurer volume 1: despite the rather clunky title (which the author apologises for in the afterword), this is a tale of an adventurer who retires to his village very early, after losing a limb
, when he finds a baby in the woods, which he raises and trains. At the age of 12 (!) she goes off to to the city to be an adventurer and rapidly rises to the top of the charts. So good is she, that she is unable to return to see her dad and friends for over five years due to the number of monsters only she can conquer. It's more a look into being separated from loved ones, the burden placed on those who are too good at their jobs and too nice to say no, as well as the joys of the simple life in the countryside.
I enjoyed it and look forward to seeing what happens next (I think there are at least ten volumes so far). Update after checking Wikipedia: Oh, I see there is also an anime. Must check that out too.