Necromanesque

AMI Kenchirou (looks like a girl) was stabbed and killed. However, he woke up not in a morgue or in a hospital but under a bridge. With no pulse and a cold body, he was indeed dead. As he was wondering what to do two girls appeared in front of him, Katarina and Nora. Katarina is a self proclaimed genius scientist studying zombies and the living dead like Nora and probably Kenchirou. Kenichirou decides to help Kata...