Home Adores, Inc. Rhett Twin Over Twin Bunk Bed with Two Drawers and Slide Antique Grey

You are safe thanks to the upper bed's full-length guardrails.  No box spring box is required because the upper bed and bottom bed are both supported by plywood slats.  You can store everything you need in the two drawers that are included, and the bed itself just takes up a small amount of room.