Haruka was surprised when the boy asked her what she wanted. Did he... know where he was?

Maybe he hadn't entered the other door, or maybe the other door was... normal, for a lack of a better word.

She peeked past the boy into the room, managing the get a glimpse of the message on the floor.

Normal... somehow she doubted it.

"Have you seen what's going on here? Have you... opened the other door yet?"

At this point, probably a pointless question. If he did, then he probably wouldn't be acting like this.

Unless he would.