Ooo, cool!
Very cute rendition of these two. You're very good at drawing long flowing hair. c:
If I may, I think this image might look a bit better if you moved the girls toward the center a bit more. Compositionally, I feel like they're a bit off-center because of Usagi's hair. Wouldn't hurt to nudge them up and to the left a little so that they're a stronger point of focus. It's not super necessary though. Still looks good!
Which brushes did you use to colour their clothing btw? I like the textured look it gives off.
Keep up the great work! Looking forward to seeing more of these, if you're still planning to do them!