In the year Universal Century 0096, three years after Char Aznable's failed attempt to force human migration into space, life continues in the colonies orbiting Earth. One such colony, at Side 4, is home to Banagher Links, a 16-year-old who lives a quiet life among his classmates. Audrey Burne, the last descendant of a great tyrannical family, takes it upon herself to steal the key to a mysterious device known as "Laplace's Box." It is said that the Box has the power to shape the course of the universe, and Audrey travels to Side 4 in an attempt to take it from its current holder and keep it from the Sleeves, the surviving remnant of Char Aznable's Neo-Zeon. In her search, she stumbles across Banagher and changes his life forever. When Side 4 comes under the attack of the Sleeves and its prolific fighters Marida Cruz and Full Frontal, Banagher takes control of the newly built Gundam Unicorn to defend his friends and protect the fate of humankind. [Written by MAL Rewrite]

It is the Correct Century, two millennia after a devastating conflict which left the world broken. Earth is now mostly uninhabitable, and thus a remnant of humanity has resided on the Moon while the Earth and its few survivors recover. For years, the "Moonrace," the people of the Moon, have continued to check if Earth is fit for resettlement. A boy named Rolan Cehack and two others are sent down to Earth for a reconnaissance mission. Rolan ends up spending a year on the planet working for the Heim Family, aristocrats living in a Victorian-like society. This family, like others of similar wealthy status, celebrates one's coming of age with a ceremony involving a giant stone statue known as the "White Doll." To Rolan's surprise, the Moonrace suddenly touches down on Earth with the intent of taking it by force. During the attack, the White Doll is broken apart, revealing a mobile suit called the "Turn A Gundam" inside. With Rolan in its cockpit, the Turn A causes a standoff between the forces of Earth and Moon. The young pilot, along with the people of both sides, must keep the peace and avoid another all-out, catastrophic war. [Written by MAL Rewrite]

The story of Gundam Build Fighters Try is set 7 years after the end of the 1st series. Now Seiho Academy's Gunpla Battle Club has only one member, Hoshino Fumina, who is a third grade student in junior high. As the president of the club, she needs two more members to participate in the upcoming All-Japan Gunpla Battle Championships. One day she encounters a transfer student named Kamiki Sekai, who has traveled around for Kenpo training with his master. Then joining by a young Gunpla builder Kousaka Yuuma, their challenge to the Gunpla Battle begins.... (Source: Crunchyroll)

It is year 0079 of the Universal Century. Mankind has moved to space, living in colony clusters known as "Sides." One of these Sides declares itself the "Principality of Zeon" and declares war on the Earth Federation, the governmental body currently ruling Earth. Using powerful humanoid robots known as "mobile suits," Zeon quickly gains the upper hand. Nine months into the conflict, the Earth Federation has developed its own powerful mobile suit called the Gundam. When Zeon launches an attack on the colony holding the Gundam, a 15-year-old civilian named Amuro Ray suddenly finds himself thrown into a conflict that will take him all across Earth and space, pitting him against the enemy's ace pilot, Char Aznable. [Written by MAL Rewrite]