Thankfully, Harry Potter had more room under the stairs than this; and though the space is fairly small and asymmetric, it needed structure. This nook had been used for stereo equipment, but as the homeowner pointed out: a stereo system composed of multiple components connected by wires is quickly becoming an anachronism. Nothing against solid state electronics.
The design is a balance between making efficient use of a relatively small space and creating something that gives the impression of symmetry in an asymmetrical space. The nook is in a hallway, but is adjacent to the kitchen and adds a bit of needed storage for things that don’t need to be close at hand. The layout is a mixture of double drawers (one big drawer with an over sized drawer front and a small drawer tucked in above) and a couple doors with adjustable shelves.