I love the colors in this room, especially that shade of blue on the walls! Plus, this is a good idea for a guest room set up - rather than one larger bed, two smaller ones so guests don't have to share a bed if they don't want to.
Storage, Astonishing Custom Wooden Bookshelves Inside Stairs In Mahogany Design Ideas Custom Bookcase Stairs Design Wooden Stairs Without Handle In Modern Living Room Interior ~ Compact Under Stair Storage Ikea to Utilize Under Stair Space
This is a perfect combo of my two favorite ideas for that space under the stairs leading to the basement. A reading nook AND book storage and shelves . assuming that there is enough space for this there.