My Vampire Older Sister And Zombie Little Sister

Who wins in a battle between a vampire and a zombie?

This question transformed from a joke to a dangerous competition between a zombie Ayumi and a vampire Erika who are siblings!

People lived in peace until this two decided to measure their powers. It isn’t known when sisters stop fighting but a horror movie has just begun! Now the citizens are victims of two rivals. Who’ll save them and stop the sisters’ hostility?