This is another great anime piece, and it shows how you really do have a talent for drawing anime.
I love the way you have drawn their hair, as it looks really realistic, especially on the blonde model, and the contrast of colours works well in this piece of artwork.
The eyes have also been done very well on the model with red hair as they really catch the viewer's attention and stand out. I like the eyes on the blonde one too, as they make her appear very cute! But the only part I am unsure about on the blond model is the nose as it appears to be slightly large, however this could just be a matter of opinion.
Another suggestion I will make would be to maybe add a background to this piece as I think it will add to the picture more.
Overall this artwork is excellent, as you can clearly draw manga extremely well and the two models work well at contrasting against each other making the composition great