Brain Battle For Imanity (人類種向け 頭脳バトル)? is a series of quiz games provided on anime's official site which people can participate in it and answer multiple different questions within a limited amount of time to see how many scores they can get. The faster the player is, the higher score. Highest score participant from each round could win Shiro and Sora's necessity to fantasy world adventure: Portable Solar Recharger. There is also a special advanced version of the game that can be accessed by typing a certain URL appeared within Episode 01.