If It's for My Daughter, I'd Even Defeat a Demon Lord

In If It's for My Daughter, I'd Even Defeat a Demon Lord, Dale is a cool, composed, and highly skilled adventurer who's made quite a name for himself despite his youth. One day on a job deep in the forest, he comes across a little devil girl who's almost wasted away. Unable to just leave her there to die, Dale takes her home and becomes her adoptive father. After she gets older he becomes her "daddy".