This is the sixth century of the end of the world. In this era, both humans and zombies have evolved and have their own thoughts. Later humans and zombies have divided into forces. There are two countries, one is the country of humans and the other is the country of zombies. In both countries, whenever a leader dies or wants to abdicate or is unworthy of the position of leader, the Elders will re-elect a leader. Each leader signed a friendship agreement with another leader after taking office, so humans and zombies maintained peace for centuries.
Ps In this world, both men and women can have children.
Concept: Cross-species love, a prequel to the world of immortality