Class rep Minegishi Hinata is saved from a traffic accident by the new transfer student Nagatsuki Shion, who survives the crash as it is revealed she is half-human and half-zombie. However, the impact from the car breaks Shion's special apparatus that keeps her heart beating, and if Shion's heart stops for even a moment, she'll become a full zombie! The only way to prevent that from happening is for Hinata to get Shion's heart pounding...