Fulcanelli, an ancient engineer and alchemist known as an "Enchanter," possesses the ability to enchant his weapons and gadgets with magical powers. After death, he transforms into a demonic being and is always accompanied by his lover Eukanaria, also a demon. However, circumstances beyond our knowledge have left him in need of a new body. Until he finds one, Eukanaria guards the pendant that contains his soul from the forces that seek to harness his power.
Meanwhile, in modern times, Haruhiko Kanou is an average boy with a talent for machines and a crush on his science teacher and neighbor Yuki Fujiwara. Unbeknownst to Haruhiko, he bares an exact resemblance to Fulcanelli and Eukanaria has set her sights on him...
