Slant cubby with a tall back pillow for a bedroom window seat, could make it storage functional and comfortable. Details of the window seat-built-in bookcase, storage under seat, piping on cushion, pillows (House of Turquoise: Lou Lou's Decor)
I think this was designed for a pre-teen/teenager, but there's a lot I like for a guest bedroom/home office. Love the built in desk and storage and love the blue, white, bright green color palate. The ceiling fixture is especially cool.
J: Finish the daybed look with a patterned pillow to make a traditional twin bed look and feel like a comfy couch. Freestanding closet units flanking the daybed provide chic display and practical storage.