Bunk Bed over Futon Curtain.
The hardest part is deciding who will sleep on the bottom and who will sleep on top. They can easily sleep two people, but at the same time if there is only one person in the room it can be used both as a sofa or bed at the same time. And there are cheap futons for sale that will be nice in your room.
A-Bunk-Bed-over-Futon-Couch
A-Bunk-Bed-over-Futon-Mattress
A Bunk Bed Over Futon With Stairs
Build A Bunk Bed Over Futon
Bunk Bed Over Futon Bigots
Bunk Bed Over Futon Breakfast
Bunk Bed Over Futon Build
Bunk Bed Over Futon Sofa