Koutetsu no Majo Annerose

Amidahara is a twisted city, well beyond the reaches of any salvation. Here, humans, demons, and criminals walk the streets with the mighty witch Annerose being one of the most feared and respected of the city's denizens. As part of her abilities, she was able to form a binding spell with a human male, keeping him as her undead servant. This man, Rikurou Tachibana, was about to end up sold to slavers, but instead, he wound up in the eternal service of Annerose—something her other servent, Mitico...