In this world, Magical Girls are the only ones who can fight the "monsters," the invaders from another realm. They must be courageous, inspire hope in people, and above all, they must never be defeated! However, some girls crumble under this heavy responsibility and lose to the monsters, tarnishing the name of Magical Girls. In the courtroom of the "Defeat Trial," their disgrace is exposed, and they face severe punishment. To save these unfortunate girls, the rookie magical lawyer, Misago Yuuri, rushes to their aid!