Yasaka Tokiwa lives in an unusual time, and according to his dreams, it's about to become even stranger. He's been having a dream of a woman called Ri'in ever since the robot, who he calls Makina, came to his...

Unfortunate accidents and strange occurrences are mostly devils' work. People might not realize this, but the world is full of devils. Professor Sakakibara and the devil Unknown solve cases between humans and...