Amate Yuzuriha is a high school student living peacefully in a space colony floating in outer space. When she meets a war refugee named Nyaan, Amate is drawn to the illegal mobile suit dueling sport known as clan battle. Under the entry name "Machu"; she throws herself into fierce combat day after day, piloting the GQuuuuuuuX. Then, an unidentified Gundam mobile suit being pursued by both the space force and the police appears before her, along with its pilot, a boy named Shuji. Now their world is about to enter a new era.