You call me a calamity? But I am Hyper Zetton!

[High-level martial arts] [Mist Invasion] [Calamity Sea Pajeton]
A fog descends, and the world undergoes a transformation.
Humans awaken their potential to fight monsters, but Wu Bai awakens to become a monster in the eyes of the monsters...
Calamity Sequence 001: Hyper Zetton.
In this life, the younger sister Wu Minmin is reborn and vows to protect her weak and helpless brother, and personally kills the future calamity king who will destroy the world... Sequence 001·Hyper Zetton.
Seeing his younger sister holding a kitchen knife and exuding murderous intent, Wu Bai silently retracted the eight tentacles behind him, wiped the monster residue from the corner of his mouth, and asked obediently, "Minmin, shall we have braised pork tonight?"
Sister: "Brother, don't be afraid. If that thug with dyed yellow hair dares to bully you, I'll make sure he never sees the sun tomorrow."
Wu Bai looked at the blond-haired man he had already fed into his stomach: "Huh? That's too cruel. Actually, I wasn't that scared..."
During the day, he is an innocent-looking senior high school student, and she is a well-behaved and adorable girl next door.
At night, he is the ultimate terror that devours all things; she is the golden grim reaper walking among humans.
Until one day, the two met at the Forbidden City.
Wu Minmin: "...Brother?"
Wu Bai: "...Sister?"
Humanity's strongest being/Calamity creature: "You call these two an ordinary family??"