Fallen Fortress

The story tells about the sudden appearance of the unknown life form "Gadoll", which has plunged mankind into a crisis of extinction for many years. In order to protect themselves, the surviving people built a 3,000M high The huge mobile fortress "DECA-DENCE". The residents of DECA-DENCE are divided into "Gear" warriors who fight Gadoll day and night, and "Tanker" who have no fighting ability. The girl Natsume who longs for and dreams of becoming a warrior, the cold-hearted armor repairman Kabuto, the girl who never gives up hope and works hard to move forward, and the realist man who gives up on his dreams, two people who seem to be polar opposites, their encounter has greatly changed the future of the world.