The Sky Survey Corps stands guard over Wall Skytree, the part of a walled city that holds the Tokyo Skytree. Its members are the familiar characters of Shingeki no Kyojin. They soon discover that an army of titans is attacking the wall. Among the attackers is an enormous 350 meter-class titan that has appeared out of nowhere beside the Skytree and does not move. This one-episode action fantasy special centers on the fight against the Colossal Titan and was screened at the Tokyo Skytree itself.