Acquiring jobs and levels—surviving on such an isolated island.

The protagonist, Kei, was suddenly transported to an unknown place while sleeping on a bus during a school trip.

In front of him, the sea; behind him, a forest—a place clearly not meant for a school trip.

He agonizes, "How could I have been thrown into nature when I was just on a bus?!"

This isolated island is actually a place brimming with fantasy, with several mysterious apps installed on his smartphone, the ability to select jobs, and the existence of levels—an environment that seems utterly unreal.

What's more, rabbits provoke him, and giant spiders lurk in the forest, suggesting a whiff of combat.

A place where he doesn't know if rescue will come, nor if there are other people.

Amidst all this, to survive, he must secure food and a base, raise his level, use skills gained from his job, and gradually improve his living environment.