Totsuzen Papa ni Natta Saikyou Dragon no Kosodate Nikki: Kawaii Musume, Honobono to Ningenkai Saikyou ni Sodatsu

An immensely powerful and ancient dragon, once worshipped as a god by humans but now only a myth in their eyes, wakes up one day to find a human girl poking around his lair. The infant is barely old enough to say her own name, but is quite confident in calling the dragon "Daddy"! Bewildered by the unexpected visitor, the dragon soon learns that returning her to human civilization isn't going to be an option...not yet, anyway. He quickly decides to raise the girl himself, determined to give her a happy life that will lead her back to human society when she is older—surely a simple task for a legendary being such as himself. All he needs to do now is find a place for her to sleep. And figure out where he is going to get clothes for her. And...wait, what do humans eat again?

(Source: J-Novel Club)