Don't set fires in libraries, kids.
The Innocent Library (無垢夢, Muku Yume, Innocent Dream) was a small area accessible from the Fantasy Library before access to the aforementioned world was terminated.
This place was randomly shaken as if someone heavy struck a door, and Urotsuki was unable to stay here for too long, as after a few minutes with the another shake she would have been forced to wake up.
There were 5 readable books in here. 4 of the books were simple and show just text. The fifth bookshelf was stained with blood, and after Urotsuki read the book the screen would be tinted red, she would fall, be teleported to a room with one of the creatures from Chaos World, and come out from her former body like a ghost. Urotsuki couldn't interact with her former body, and would stay in the room until she was caught by the creature. After that, she would be teleported back to the Fantasy Library near the couch.