In a mysterious global phenomenon, an entire school bus—along with its students—is teleported to an ancient, forgotten world. Unlike Earth's recorded history, this world is a chaotic fusion of prehistoric eras—from the Cambrian period’s giant arthropods to the mighty dinosaurs of the Cretaceous, and even extinct Ice Age predators. This world follows no logical timeline, as though someone—or something—has crafted it artificially.
Amidst the confusion and terror, a select group of students, including the protagonist, Kai, awakens to a strange blue screen floating in front of them:
[SYSTEM INITIALIZING…]
[Welcome to the Forgotten World. Survive, Evolve, or Perish.]
This mysterious system grants Kai and his classmates the ability to level up, gain skills, and unlock unique abilities—strange powers that seem to be connected to prehistoric beasts themselves.
But Kai is different—his unparalleled ability "Primal Overdrive" allows him to fuse max level skills that no one else can, giving him an edge that could change everything.