The year is 2242. Kanata wants to be a Drifter and meets Noir, who is a dud Magus with no memories. However, because Noir excels in battle against the Enders, Kanata partners with her and discovers exactly what it takes to be a Drifter.

After a chance encounter with a self-proclaimed kaiju tamer, a high school student is drawn into a world of fighting mechas and monsters.