Ernea, a boy with dreams of becoming a hero, lives near the Dragon's Peak where Dragon tribes reside. Raised in the kingdom's capital intertwined with dragons, he embarks on a journey at fifteen. While working hard with classmates, Ernea encounters an Ancient Dragon in the Forest of Dragons during a routine food gathering trip. Under the Ancient Dragon's tutelage, he clumsily trains to fulfill his desires of heroism and finding a well-endowed bride. As he matures alongside his companions, Ernea gets entangled in the escalating strife between the Mazoku and the Dragon tribes.