Ankoku Gakkou

On a Saturday, students gathered at school to prepare for the festival. During a break, they lost consciousness and awoke to find the building in darkness, with all doors and windows sealed by stone walls. They are unsure of what caused this—whether it was a classmate's curse, the school sinking, or being moved to another world. They are trapped together with only a limited amount of food.

Isinasalin pa — orihinal na teksto sa English.