あらすじ
It isn't the world you know. There wanders a girl with jet-black hair, ebony clothes, and a strikingly blue, glowing eye. Her name is Black★Rock Shooter. With a huge cannon in hand, she throws herself into a fierce battle... Meanwhile, in another world, middle-school student Mato Kuroi is drawn to Yomi Takanashi, her classmate with an unusual family name. Mato does her best to talk to Yomi, who just won't open up. Yu Koutari mocks her best friend Mato's efforts but at the same time, supports her.
あらすじはAniListより（英語）。