Contained within the DVD collection of Chikyuu Bouei Kazoku is a different rendition of episode 11, also referred to as episode 11.5. The focal point of this specific episode is on the unveiling of "Amber Crystal," which is the very first experience simulation game park in the world, situated in Chiba Prefecture. The opening day of the park is exclusively restricted to couples possessing exclusive tickets. Seiko, along with Hayakawa, a cameraman, joins forces with Mamoru and Junko-sensei to experience the thrilling adventures of the park. Mamoru sets off on a journey as a knight in order to progress and acquire XP, while Seiko assumes the role of a mage. However, Seiko promptly becomes aware that there is more to the game park than meets the eye when it gets attacked by a space monster. Despite initially assuming it was just a game, they come to realize, rather belatedly, that they are in grave peril.