Nice now I am all curious! I was looking for something to distract me... My knowing of lain's room is still quite limited but I understand is some kind of show?
Its an interesting image as she does not show any sadness or discomfort. I am briging that up because the eyes and expression is not a neutral expression. More like a faint smile or like expectation of something interesting...
The room is excessively clean for what shows. At first I tought the light was coming from were she was looking. But then I realized that's its probably a window in the back. The shape is weird but the cuts are not clean enough and it would be odd to have such a large number of openings on a door. Even a locker who usuely uses a system similar for filter have less opening and gaps are smaller. + what seemed to be a dept. perception on the side of the bars and the chairs shadow.
Details like these and the positioning doesn't look big, but its noticeable because of a few unusual placing of objects, then again you are not a designer and I don't have anything but experience in discomfort to guide me. (like having sun light in your face on the computer is a brutal reality depending on sun orientation)
Anyhow I listened to the music. Its nice and I see how you made it. Thinking were you must have started on the drawing and how you got to that. Its really fun and nice. You zoned on the calm repetitive and soothing sounds... I even started to make my own conception of it! Thanks for this lead on the show and its a really well done picture.
But yea... Again about the positioning. It looks so much like nothing really happened there. Nothing lived in there. The lack of personal objects, particularity's like markings or messes. It is as the picture show a room only for utility with a lack of distractions. Like a brand new empty desk in an empty room...