Gokudou Faust

The magic that once ran rampant was thought to be lost due to modernization. However, in fact, it was secretly handed down from family to family in the world's underground. It's been 20 years since Shinjuku was devastated by the war between modern technology and magic. Kagura Faust and Mephisto set up an office in the middle of Kabukicho to further conflicts between the two worlds. Original Web Manga