Monster apocalypse, everyone awakens to the Ultra system.
The protagonist Yu Fei, originally a senior high school student, was involved in the world of judgment while taking a nap in class.
This world is no different from the real world except that people don't know Ultraman.
When he opened his eyes again, outside the window was already the apocalypse of a city full of monsters.
The others who awakened were Sero, Tiga, and Beria.
The good news is that the protagonist awakens Nexus, the bad news is that he is only 12 meters away.