Hajime and Yue encounter a powerful foe in the deepest depths of the Labyrinth. Will they be able to defeat it and find a way out?

A rare oasis lies in the depths of the Labyrinth. There, Hajime and Yue come face-to-face with the specter of the labyrinth's namesake.

As Hajime's deadly duel versus Noint continues, Aiko and Tio hatch a plan to assist Hajime. The other students also notice the alarming noise and gather together to figure out what's going on.

With her trap sprung and all of the students rendered unable to fight, Eri reveals her true nature and sets the rest of her plan in motion.