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.
I'm your Sanity Anchor, Mochiki Sumire.
أنا مرشدة الاستقار العقلي  
خاصتك، موتشيكي سوميري
Ich bin Mochiki Sumire,
euer Sanity Anchor.
Je suis Mochiki Sumire, la Sanity Anchor.