The strongest and oldest dragon who had lived through eternity allowed himself to be killed by the Hero. Just as he prepared for eternal sleep, he realized that he was reborn as Dran, a villager living in Bern, a small place in the frontier. Working the field, hunting forest animals, and having a warm life has filled his heart with joy he never experienced in his whole dragon life. One day, while he's patroling the forest near his village, he encountered a powerful demon army...