Seeing the image file on my computer now made me realize how large and poor quality it was, haha.
Anyways, here's the inked version of the drawing. I'm gonna touch up this lineart some more and colour it in.

Nice job! The expression on Takane's face captures her serene personality. I'd like to see some folds or wrinkles in her dress, though, but I admit that I don't know how to draw them, myself. By the way, was this picture taken on an airplane?
Thank you! I added some folds to Takane's skirt. Hopefully they look okay. No, I took the picture in my hotel room. The lighting there wasn't too good, especially because it was night-time.
Gigantic picture file aside, I think it looks pretty nice so far! I do agree that Hibiki's bangs look a bit on the flat side, but that's something that can easily be fixed before inking. Overall, nicely done. I like the expressions. They capture the characters really well and the contrast between Takane's calmness and Hibiki's hyperactive nature.
Thanks! Hopefully this time the file is a bit smaller ^^;. I fixed Hibiki's bangs and her face shape a bit, I think they look better now.