Sleeping Tamaki looks so adorable but that panty flash is making me think bad thoughts and so is Hinata. I remember reading somewhere that Hinata in the novels is a bit of a tease, messing with Kyousuke on his relationship with her sister. Still waiting to see those chapters translated.
Fanart for these sisters is quite rare, this is one of the best I've seen so far. I hope this artist does more for them.