Lost in the Cretaceous

The old group was shut down. The new group is 792811916 (Dragons, Steam, and Airships).

A corner of a city suddenly transmigrates one night, without warning, to the Cretaceous, where giant beasts roam. What will happen? The most vicious predators in Earth's history? Giant prehistoric insects? Or the collapse of order and the cruelty of human nature? Courage or cowardice, baseness or greatness, everything will be laid bare in the face of disaster. But they have no idea that what they will face is far more than just dinosaurs.