I like the anatomy and how you dipicted Aya's figure. I think you should move on to the next step of putting in more detail and have her posing. I see nothing wrong here at all. Hopefully you can try to incorporate a more off white color instead, and try to draw in her mouth, I understand the style of drawing, but maybe trying something new isn't always a bad thing. Other than these hopefully helpful tips, I enjoy seeing your work. Keep it up and don't stop drawing. I would love for you to reply to me and give some feed back if that suits you. Hope I wasn't too harsh I would hate to have hurt your work and feelings rather than help them.