Deep Insanity THE LOST CHILD

A strange disease is linked to a mysterious hole leading to an underground world: the Asylum. "Sleepers" go into this world to fight strange monsters and recover unknown resources. Now, a young boy who dreams of being a hero has arrived at the Asylum.

As Shigure begins to settle into his new life as a Sleeper, he starts to wonder what he's good at, and what he can accomplish down in the Asylum.

Larry goes on a dangerous and illegal mission deep into the Asylum, and forces Shigure to come with him.

Shigure investigates the past of XO Leslie when a mysterious assailant suddenly ambushes them.

Shigure is always awkward around Kobato, and the rest of the team thinks he might have a crush on her. They scheme to set them up, but...

The day of the plot has arrived and the team heads into the Asylum. But when Hayden appears during the mission, things go very wrong.