Adventure Time - Season 4, Episode 10: Sons of Mars - Burning Low
Trailer
Although all say that a Flame Princess is an evil one, Finn, a young teenager boy, who befriends Jake, an old wise dog with a magical power and helps him in saving the world from evil, through their adventures, does his best, in order to win her heart, as he is deeply in love with her, the thing that brings many terrible for him.