Real Room
One of only two locations Madotsuki can access outside of her dreams. She can only sit at her desk and write in her dream diary (saving the game), play NASU, go out onto the balcony, or go to sleep here. She refuses to go out the door, unlike in the dream representation of her room.
Dream Representation
When Madotsuki goes to sleep, she finds herself in a dream representation of the room. Here Madotsuki can no longer play NASU, write in her diary (although she is still able to sit on her chair, which can result in a glitch) or go to sleep (although a random event is associated with this). However, she is now able to go out the door, which leads to the Nexus, or see an "eye" in the TV (or in some cases, a random full-screen event).
Screenshot of Madotsuki's room