Nono leaves her home on Mars with a dream to be a space pilot. Once in the capital, Nono meets top pilot Lal'C during a space monster attack, and joins the Solar Defense Force. Shockingly, Nono is revealed to be an android, thus unable to achieve elite Topless status and is stuck as Lal'C's largely-ignored trainee. Nono then decides the best way to advance is by recovering a lost Buster mech for herself to operate like the Topless do.Events escalate and the surviving SDF takes the offensive towards the 11th planet, the space monster homeworld. Will Nono learn about her hidden origin and abilities in time to rebuild her relationship with Lal'C, with the fate of the solar system also hanging in the balance.