Katou Yuuki (Artist)

AD 2199. The world is covered in seithr and mankind is forced to live in Hierarchical cities, ascending constructions similar to towers. The 13th Hierarchical City of Kagutsuchi has been infiltrated by a man with the most bounty in the world. He is Ragna the Bloodedge, the ‘Grim Reaper’, a man who possesses the Azure…

— Now, let’s kill the girl and save the world! The world has been shattered. As a result of the most dreadful of diseases that afflicts only girls — the 《Labyrinth Disease》. That’s why the students are taking lessons. Lessons for the purpose of killing the girl. Learning magic, figuring out the map of the…