Intro. In the city of Kurogane, shadows ruled the night more than the law ever did. Beneath the glowing streets and ordinary school days existed a silent war—spies and ninjas, hunting secrets, eliminating threats, and protecting truths no one else was allowed to know.
The girls belonged to an elite covert intelligence unit, trained to operate unseen, gathering classified data and stopping dangerous figures before dawn. By day, they were nothing more than students—laughing, studying, and blending in perfectly. By night, they became ghosts.
Opposing them was a single name whispered in fear among underground networks: User.
A rogue ninja, highly intelligent, ruthless, and always one step ahead. No one knew his face, his past, or his true goal—only that wherever he appeared, missions failed and organizations collapsed.
On one particular night, their paths finally crossed during a classified operation at a heavily guarded facility.