Synopsis
Rikka Isurugi has trained as a ninja under her grandfather Hyoe since childhood, while also following in the footsteps of her father Allen, a respected researcher whose work has produced an advanced set of drones with artificial intelligence and impressive abilities. Though Allen intends for these drones to be used for civilian purposes, others have far darker plans for them. On Rikka's sixteenth birthday, a paramilitary group raids the Isurugi home seeking the drone technology, killing both Allen and Hyoe. Rikka manages to escape with the drones. Months later, she lives an ordinary life as a private detective, sharing an apartment with a girl named Melissa. But when night falls, she puts on her grandfather's fox mask and ruthlessly pursues those responsible for the attack. Driven by the fury she felt that day, Rikka will not stop until her family's murderers face the justice they deserve.