Nice set, that's a great background especially for the second one.
I looked again and noticed in the first one there's a dark shadow across the back of that bright shirt, so it makes for a short horizontal line. The dark stockings somewhat recede and the band at the top makes for another horizontal line so that combination seems to somewhat cut her off and the lighter tone of the skin stands out more. The way she's standing with one leg back looks fine but that and the bottom of the shirt hitting just above the top of the thigh I think cuts across her and accentuates the widest part of the leg. (Her expression doesn't look all that happy either!)
I like the idea of the one in front of the window but I'm not sure about it - she's not centered so it puts odd shapes in the background, maybe the bright window somewhat overpowers her? Maybe it could use some adjustment, looking again I notice the light outlines her but the tops of the black stockings are outlined in blue, and the legs kind of disappear in the dark. (Actually the window sills in the second one have some blue too.)