Due to Earth's increasing climate crisis, humanity has developed futuristic technology to migrate to the Moon. Tomura Sawyer works as a courier in the higher areas, saving money for his little brother, Haru, who suffers from Smoky Moon Disease - a sickness produced by the smoke and polution from the lower areas. The two siblings dream of moving to the higher, cleaner areas to treat this disease. Tomura takes a gamble to do the impossible: to participate in the TV program Run for Money and to win against all the other contestants even if he doesn't have the Chrono Bracelet required for it. A producer of said program by the name of Harvest seems to take an interest in Tomura's determination to participate, so she gifts him the Bracelet and allows him to participate. In this glorified game of Tag, Tomura Sawyer must last longer than anyone else without being touched by the enemies in this game — the Hunters.

The story is centered around Filena, a princess who was raised as a boy after her kingdom was conquered.

Dr. Kazuki, who perceived of an invasion of Earth by the Izaru people builds a robot based on the science of magnetism and sphere joint theory. Undergoing a dangerous augmentation process, Dr. Kazuki's daughter Mai becomes the pilot of Mighty or Magnetman Minus. Takeshi Houjou becomes the pilot of Puraiza or Magnetman Plus. The pilots would hold each other and then physically trasform their joint bodies in a metallic plate locking itself on the Gakeen (Short for Gathering Keen) robot's frame thus enabling the super robot to move and fight. This sequence was notable, to an adult's eye, for its almost-sexual connotation. (Source: Wikipedia)

Second OVA of Hana no Asukagumi!.