Gorgeous! I really love the pool of fabric, and the sexy positioning of Glinda-she is not only straddling Elphie and pressing her body into her, she's got her breasts pushing up into Elphabas as she kisses her.
I love how Glinda's skirt swirls inside the lines of Elphaba's (also, I never knew Elphaba's name until now). It has this feeling of being like a circle; self contained and continuous. doesn't need a background.