The bunk system solved several problems for this room. It provided space for a built-in closet beneath the upper bed as well as room for a table and chairs. It also hides a storage trundle and niche at the foot of the lower bed.
Complete DIY guide on how to build a loft bed. Basically a box on top of 4 posts with two twin beds pushed together on top. Such a cute kids room idea to save space :). ( girls room with a bed underneath also )