I'd like for someone to add the other parts of their legs (including the left girl's tail) from the original image, upscaled/zoomed in to match the resolution of the attached, and ideally with the missing parts of their legs drawn in (don't bother with feet):
https://files.catbox.moe/ofu6y3.pngIf you don't feel confident in drawing in new parts of their legs though, just remove the extra portions and align them roughly how they are in the original.
Please also try to recolor the background to the exact shade of the original, to obscure rough edges from when they were cut out.