Zoku Wagaya no Dungeon: Gakkou no Dungeon

is the second volume of the Wagaya no Dungeon light novel series, written by Ibukiyo Amou and Illustrated by Urabi. It was released under the Dengeki Bunko Imprint in March 2015.

Synopsis
A slapstick extraordinary daily RPG comedy, and a special and re-appearance!

Higurashizaka brothers and sisters who solved the mystery of the dungeon hidden in my new house. However, this time ... the school has become a golem !? A sequel to the extraordinary everyday comedy that unfolds in the present age when monsters and magic have begun to infest the world!

(source: Dengeki Bunko Official Website - Translated)