A single special episode continues the story of Yuuya, a boy who was bullied at school and neglected by his parents until he found a strange door in his late grandfather's home. That door leads to a magical world full of rare treasures and powerful skills, which he brings back to Earth to remake his life. Titled The Legendary Dragon Awakens, this action fantasy with romance comes from a light novel series by Miku, illustrated by Kuwashima Rein.