Ossan, Yuusha to Maou wo Hirou

An old man is forced to retire from the adventurer's guild and decides to return to his hometown. <br> On his way, he picks up two babies. The first one is a human baby with the emblem of a hero.<br> The second was a baby of the demon tribe with the emblem of the demon king.<br> And so the story of the old man who picked up the hero and the demon king begins.