Just how dangerous is the Nanoha world? The Three Great Magical Cannons! Ancient relics! Dimensional earthquakes! Ever heard of a Rainbow Cannon?
I cultivated immortality in my dreams for three thousand years and thought I'd figured out the limits of this world! I never imagined it had no limits at all!
The Jewel Seed conflict and the Fourth Holy Grail War spectacularly collide! The princess in military uniform takes the opportunity to stir up trouble, too!
Misaka, Kurumi, Alucard, Aizen, Esdeath! These familiar names from anime, comics, and games split into two factions and crash the Jewel Seed and Holy Grail battles!
Then you tell me there's also Komao Academy in Setagaya Ward?! And that the Seventh Abyss is hidden in the Underworld of Japan?!
"..."
"What? That unlucky kid caused trouble eight years ago and didn't close the door properly, so Earth is now connected to another world?!"
"..."
"Executive Officer Kazami, we've detected dimensional contamination energy known as 'Honkai' in unadministered world number 90! Awaiting instructions."
"..."
"Executive Officer Kazami, an unknown time-reversal phenomenon has been detected in unadministered world number 33!"
"..."
Yuji yelled, "Are you trying to make sure nobody can live in peace?!"
