The Undertaker's Panties Vol.1 (Hentai Novelette)

The world has come to an end the remaining survivors hide in small out of the way settlements and villages as the Necros, living dead zombie like creatures with human level intelligence and the ability to regenerate, spread their infectious pandemic across the globe in an effort to turn all that remain into their own and become the new humanity. To save humanity god has sent the Color Reapers to the earthly plain to recruit Undertakers to fight against and imprison the Necros so humanity may have a chance to survive, but the Necros have a desire for human flesh different from their zombie counter parts and to win the supernatural war against these undead the Undertakers will have to make sure they can keep their panties on.