In the year 2005, a race of alien monsters called Zonders emerge from underground and launch a series of attacks on the city of Tokyo. The only defense against these creatures is the secret agency known as the Gutsy Geoid Guard (or 3G) and their ultimate weapon, the awesome giant robot GaoGaiGar. GaoGaiGar's pilot, Guy Shishio, is a former astronaut who was nearly killed two years before when the Zonders first crashed to earth. Guy's life was spared when a mysterious robot lion called Galeon pulled him from the burning shuttle and brought him to Earth. Guy's father, Leo, then used Galeon's technology to rebuild his shattered son as a cyborg, in the hopes that he could stop the aliens when they appear. Now, with Galeon as its core, GaoGaiGar fights to protect Earth. He is aided by a team of transforming robots and by a young boy named Mamoru, who has the power to purify the Zonders' cores, and seems to be connected to the mysterious Galeon. (Source: ANN)

In the not so distant future much of the earth has been submerged under the sea or destroyed by earthquakes. At the center of the turmoil is the mysterious Orphan. Orphan may or may not be the original cause of the cataclysms. Orphan's goal is to raise a ship hidden deep beneath the sea to the surface, but doing so would result in the destruction of all humans except for the small number which are loyal to Orphan. Orphan's agents pilot mysterious mecha known as Grand Cheres, and search the world for mysterious, giant disks which occasionally appear, flying at high speeds and wrecking much of the countryside, or cities, when they hit the ground. After a dying disc almost kills Hime, a Brain Powerd is born from the disc. Brain Powerds are another type of Mecha, similar to but not the same as Grand Cheres. Hime becomes the Brain Powerd's pilot, forming a symbiotic relationship with the living mecha and joins an International Organization dedicated to stopping Orphan, or at the very least saving humanity should Orphan succeed. (Source: AniDB)

Rygart Arrow is different compared to the other people in the continent of Cruzon: he is unable to control quartz, branded an un-sorcerer. Despite this, he still befriends the future king and queen of Krisna—Hodr and Sigyn—as well as Zess, the younger brother of the Athens Commonwealth's Secretary of War. Several years later, Rygart discovers that there is a war brewing between Krisna and Athens. While visiting Binonten, the capital city of Krisna, he learns that his misfortune as an un-sorcerer enables him to pilot an ancient Golem, a unique ability that quartz-wielding users lack. As Zess leads one of the Athenian strikes upon the capital, Rygart joins the battle with his newfound power in hopes of mending the schism between the two nations.

Crown Prince of the Kingdom of Lucis, Noctis Lucis Caelum, sets out on a journey to Caem. His purpose is to meet with Lunafreya Nox Fleuret, an oracle and Noctis' childhood friend, in order to marry her. A strong and silent type, Noctis is accompanied by his friends and Royal Guard Gladiolus, Prompto, and Ignis. The four young men set out on a road trip across the continent in the king's personal convertible, the Regalia. Along the journey, each of them experience various situations which allow them to reflect on their past together, and strengthen their bonds for the future. A prequel to the 2016 video game Final Fantasy XV, Brotherhood: Final Fantasy XV explores the relationships of its four main protagonists and the challenges awaiting them.