At the end of the 21st century, humans have made great advancements in technology and were able to create a giant energy source to power that technology. However, this new source of energy overloaded and tur...

13 years ago, an unknown object appeared at Shinjuku. That creature regularly gives birth to a demon. Therefore, our world is being eaten clean. The military found a weapon capable of fighting these creature...

Ten years ago, a mysterious black sphere appeared in the sky and destroyed the city below. Kagerou and Momiji were children when the destruction took place, growing up together into teenagers under this omin...