In the 21st century, a species called "World Demon" appears all over the world. Not only does it have unparalleled physical fitness, but it also has various weird abilities. They have caused horrific tragedies around the world. Just one year after the "World Demon" appeared, "superhumans" appeared all over the world. They had the power to fight against the "World Demon". Their extraordinary lifespans and powerful bodies told people that there is still hope in this world.
"My name is Lei Xiaoyuan, and I will kill all the world demons in this world."
