OCs: Yandere bro and sis?

So right after I was done with this image, I decided that this will be for a short story around 20 pages. I tried strong lighting however the details get eaten. Guess that I am naturally an artist with pale colors .

The boobs, that is the best part~ Let me know your thought.

Follow Instagram for work in progress.
www.instagram.com/xinillus_manga