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 finds herself drawn into an illegal mobile suit dueling sport known as Clan Battle. Under the username "Machu", he engages in fierce combat day after day, piloting GQuuuuuuuX. Then, an unidentified mobile suit Gundam appears before her, pursued by both space forces and the police, along with its pilot, a boy named Shuji. Now, your world is about to enter a new era.