In the world of Gift, the bowels of the planet hide a highly sought after crystalline substance known as Giftium. A young boy on Gift named Sougo Amagi inherited his interest in Giftium from his mother, a researcher. As an inhabitant of Garden Indigo, a small and prosperous miner's town, Sougo has many opportunities to forage and collect rare crystals that can only be found there. However, the most exciting treasure that Sougo discovers is not a crystal, but a person. After being pulled into a school quarrel, he plummets into the deep caverns of an old mine. There, in the abysmal depths of the earth, Felia—an enigmatic girl with red eyes and blue hair—emerges from a large crystal. Through this strange first encounter, bonds of friendship are formed between Felia and Sougo. But Felia is being pursued by a secret organization that aims to use her powers for their own benefit, and Sougo and his friends must help her, all while discovering the true nature of this girl from the crystal. [Written by MAL Rewrite]

In the future in Onomichi, Hiroshima fish disappear from the sea around the world and only whales live in the ocean. The Ministry of Fishery decides to set up giant experimental Universe Fish Tanks in space. The Onomichi Universe Fishery Union is established and begins to train space fishermen. Female fishermen are in demand due to the strengthening of an equal employment law for men and women. Six new female space fishermen are selected, and the story centers on supporting their growth. (Source: ANN)

Take place 2 years after the last episode of the TV series.

Detective Sonia Summers are tracking Bem and the others. She reunited with Belo, who is fighting a dark organization alone. He brought her to Bem, but Bem doesn't remember anything and living in the city as an ordinary employee... or that is what he thought he was.

It is the dawn of the 21st century. The cataclysmic earthquake which reduced half of Tokyo to a broken landscape of twisted steel and shattered stone was only the first sign of the impending apocalypse. Athletic and popular, Isato Kaiza was an otherwise ordinary student. But nothing could've prepared him for the day he was given a Caizer Stone by fellow student Kash , alias Hellstinger. Armed with the mysterious crystal, Isato now possesses the power to transform into the armored hero: Gowcaizer! To save the Earth, Gowcaizer and Hellstinger must join forces against Omni Exist, the manifestation of all negative human desires, and the force behind the recent disasters, before the entity obliterates the human race!