Simple black white leggings or stockings. The skirt can't sit like that unless you use a sturdy construction underneath it but you would see it. Try using lots of tulle under it or a sturdy panel set of fabric.
Past cosplays: Hatsune Miku, Alois Trancy, Fem!Ciel, Little Sister
In Progress cosplays: Heartseeker Ashe (LoL) - Pattern Made. Harley Quinn (Burlesque) - 20%
I take cosplay commissions :3