I Woke Up Suddenly As The Weakest Dungeon Master

Liam Benjamin fell asleep during a mathematics test, before waking up on a stone brick room. Now the weakest Dungeon Master, with no fighting ability whatsoever and the unfortunate event where his life hinges on the debuffer succubus that has no combat skills. Liam tries to build and maintain his dungeon whilst humans and demi-humans alike try to destroy it, and with, his life.