They travel to Reisen Gorge, containing the entrance to another labyrinth. They are greeted by the voice of hyperactive Maverick Miledi Reisen who built a maze-like labyrinth filled with practical jokes which mostly target Shea. Several of Hajime’s classmates decide to abandon the labyrinth and help Aiko on the farms. Hajime and the girls make it to the bottom of the labyrinth to face the boss, Miledi herself operating a giant robot. After a lengthy battle they succeed in cracking her crystal heart...