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.

A look back at the trials and tribulations Hajime faced in the dire abyss of the Great Orcus Labyrinth.

After finally making it back to the surface, Hajime and Yue encounter a rabbit girl who claims she's been "waiting for them" -- and needs their help.

Hajime and the gang reluctantly accept a quest. Their journey north to the town of Ur leads to an unexpected reunion with their teacher, Aiko.

Hajime's quest leads him and his classmates into the mountains, where they come across their quarry -- and the huge black dragon attacking him!

Tio escapes the volcano alone and flies towards Ankaji. Meanwhile, Hajime and the others, still in the volcano, hatch a plan to escape the incoming lava without sacrificing any of their goals.

Hajime and his party departs the city of Erisen to head towards the Sunken Ruins of Melusine. They solve multiple puzzles to reach the labyrinth, and are confronted by a mysterious illusion.

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.

Hajime, Yue, Shea, Tio, Kaori and Yue take a detour to learn more about each other, their outfits, and Japanese otaku slang.