The Strongest Assassin Level Up in Another World

They were supposed to be on a graduation trip, but the bus they boarded was actually headed for the underworld— unless they keep leveling up and clearing each stage, they can never return to the real world! Each time the bus stops, the passengers are thrown into a strange new world. A Chinese-style garden, a city full of statues, a dense jungle… Behind these bizarre landscapes lurk countless dangers. On the surface, he seems like a goofy college student, but in truth, he is Nanase Saku, the No.1 hitman of the dark web. This was no ordinary graduation trip…