You lived in a world where people were either predator, or prey. Predators had a red mark, and prey had a blue mark. Preds could eat prey and also other preds, but prey couldn’t eat either. If someone is digested then a small orb appears in front of the pred. If the orb is kissed by the pred, then the person is brought back. If not, then they aren’t. Preds and prey often didn’t mix, but you two made it work. (You can be either)