Eighth

Fulcanelli is an "Enchanter," an ancient engineer/alchemist who is able to imbue the weapons and gadgets he constructs with magical powers. Transformed into a demonic being after his death, he is always accompanied by his demon lover Eukanaria. Due to circumstances still unknown, he is in need of a new body. Until one can be found, Eukanaria must guard the pendant containing his soul from the many demonic forces that wish to obtain his great power for their own. In the present day, Haruhiko Kanou is an ordinary boy good with machines and nursing a crush on his science teacher and neighbor Yuki Fujiwara. Little does he know he is Fulcanelli's perfect double and Eukanaria has tracked him down...

Plot: Eighth Research is a large biotech company based on advanced research and development of DNA manipulation. Naoya Graphico is on the security team for the company run by his uncle. Naoya has been acknowledged for his high combat skills and is sent on top secret missions regarding Eigth Research's interests. His most recent task has Naoya infiltrating a rival company where a mysterious girl named Celcia has been kidnapped. Naoya's passion for protecting the weak always helps him accomplish missions; he just needs to make sure his libido doesn't get in the way.