My Zombie Girlfriend

A disaster caused the entire world to be overrun by a zombie virus. Early stages of zombification make the infected lose their humanity and part of their memories. In his search for a vaccine, Enze accidentally discovers a zombie girl, Xiaoxi. After escaping the zombie-ridden vaccine lab, Enze and Xiaoxi experience various trials and tribulations. However, Xiaoxi's body is getting weaker, the existence of a vaccine becoming more and more like a mirage.
(Source: Baidu Baike, edited)