Doomsday Call: Starting from Contract Golzan

In the end of the world without Ultraman, dimensional rifts have opened wide, a wave of monsters has swept the world, and human civilization is on the verge of destruction! The white-haired boy Chu Bai accidentally awakens the [Ultra Monster Combat Instrument] and starts a contract with the super ancient dark monster Gorzan! The earth-burrowing technique tears the earth apart, and the ultrasonic light blasts the monsters to pieces! Bemonstein? Take him on as a support staff! Jetton? The contract becomes a doomsday murder weapon! In a world without Ultraman, I understand that he is the master of the apocalypse who controls monsters! [Ultra fan + apocalyptic summons + cool writing + invincible start + no heroine]