“Does leading a class in another world count as part of my teaching job?” A dungeon survival fantasy! High school teacher Haikarasan struggles with the gap between the ideal teaching life he envisioned and the reality of his assigned homeroom class. One day, trying to stop bullying when he witnesses students being harassed, a mysterious voice echoes through the classroom… Suddenly, the entire school building—and his class—are transported to another world, a dungeon realm! Thus begins the story of a once-disheartened teacher’s rise to adventure in a completely new world.