This is an example of how to wear skirts in the Winter. Plain black leggings allow you to wear any kind or color of skirt. And we can't forget about the shoes. Who doesn't love these shoes? And that's a cute skirt, by the way.
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.