The Dark Mage: A classroom Isekai

Eric is a normal high school student. On the day of his Mathematics exam, his entire class suddenly gets transmigrated into another world. They have been summoned by an unknown entity and thrown into the depths of a forest full of danger and monsters.
But as situations looked dire, everyone suddenly got a notification sound - [Welcome to the world of ORION!] [A class is being selected for you! Please wait!]

Everyone got their own classes and skills. Eric Included. But the class he got was a rather odd one. A Dark Mage. A class that's only good at combat and nothing else. Also, a class that's scorned by the world's natives.

Follow Eric and his friends as they struggle to survive and find a way back home, back to earth, back to their families and friends.