Panty & Stocking anyone?
Cuz yeah, this reminds me of those characters. Pretty funny anime. Look it up on youtube, ya'll. Problem is, it's all Eng. sub'd and not dubbed. Oh well.
As for criticism/rating, this is gonna get a 6 with me. Largely because of the oblong shape of the faces. I'm not worried about the background simply because I ALSO suck at backdrops. Which is why I RARELY do them. The chick on the right looks okay, but the gal on the left's face is reeeeeeeeally slanted in a way that it shouldn't be. Even by anime standards.
Do you research human anatomy? 'Tis a good idea to do so.
ALSO, do you draw your characters' bare forms before adding clothing? That would really help you get their forms correct. Start with basic shapes and work your way up to muscle groups'n'the like. With women it's a TAD more difficult simply because breasts aren't a muscle group. ha And if you're anything like me, breast physics really add to the difficulty depending on the pose and apparel (or lack there of if you dabble in that area lol jk jk). If naked people make you uneasy, fret not, as you don't need to add any of the naughty bits. Just the general outline should suffice.
Disregard all of that if you knew it already. But if you want more tips'n'such feel free to ask via note or whatever the private message system is here. I don't plan on writing out a tut in the comments section XP
Hope I could help. :3 Keep at it.