In Dr. Stone, a blinding green light strikes the Earth and petrifies mankind around the world, turning every human into stone. Thousands of years later, Taiju awakens to find the modern world completely nonexistent.
In UchiMusume, Dale is a respected adventurer in the city, one day while hunting magical beasts, he comes across a devil girl named Latina. She is alone and starving, and he decides to take care of her.
In Fire Force, Tokyo is threatened by devils that cause people to burst into flames. Many years have passed, and new generations are able to control flames at will, Shinra is one of them, and wants to become a hero.