Onegai☆Twins, W: Wish Recommendations
If you liked Onegai Twins I recommend watching this next.
It's alot like Onegai Twins due to two sisters trying to be with their brother.
(not in the weird incest way that some think >.<)
A Brother and 2 sisters. But only one can be his sister.
They are essentially similar stories. Bother revolve around the Supernatural to an extent. And carry similar themes.