Based on a media series that began with characters created by cartoonist Fuke "Huke" Ryouhei and was subsequently inspired by a song of the same name by Ryo, a music Kuroi Mato has just entered junior high school, and on the first day, someone catches her attention; her classmate Takanashi Yomi. The two come together. Mato, the pure and naive. Yomi has matured. Although they appear to be diametrically opposed, the time they spend together only enhances their blossoming bond. However, when they enter their second year of high school, they are separated into different courses and begin to grow apart. In another universe, Black Rock Shooter, a young girl with blue fire in her eyes, fights another young girl, this one brandishing a jet-black scythe, Dead Master.