The double-deck beds are arranged in a pattern of inverted "U". Chan Gu and Feng Lei already occupied the bed located at the far end corner of the room. Now the remaining options are the beds at either side of the room.
Long Yue chose the one on the left side, lower deck.
Since Long Fuzi will be staying with them as well, he should be occupying the upper deck of the bed.
On the other hand, left with no choice, Mu Lingxi settle herself at observing the wooden cabinet next to the double-deck bed at the right side.
She will be sharing the double-deck bed on the right side of the room with their last dorm mate.
Before Janus can fully immerse himself from his imagination of jumping into the upper deck using his top-notch agility, Mu Lingxi already made up her mind.
"Since he was the last one to arrived, I will take the advantage to choose which bed I prefer. I will be using the lower deck..."