Mecha pilot Rikka Takanashi, a Major in the army, has been branded a deserter for refusing to follow orders that would endanger civilian lives. As she flees, she is confronted by her best friend and fellow soldier Sanae Dekomori. With the twin-tailed girl standing between her and freedom, Rikka must come to grips with defeating her dearest comrade - or risking her own life!
In a dark and dreary dimension, the mysterious Black Rock Shooter roams the desolate landscape with her gigantic gun, pausing only to battle against other mysterious super-powered girls. Elsewhere, a teenage girl is excitedly preparing for her very first day of junior high, eager to begin her new life of attending a basketball club and befriending the elegant new girl. But what exactly is the connection between these two worlds?
Has a similar style and feeling to it with little to no context being given most of the time during it's run.
Watch cute girls with unconventional character designs battle it out in short little bursts. There's little in the way of plot or exposition. There's just enough explanation to give the characters a reason to have flashy battles.