 If you liked
Pastel
|
 ...then you might like
Ane Doki
|
Someone recommended Parallel for Ane Doki, so I'll recommend Pastel.
Well this is by the same mangaka - and this is the more successful work.
It also has romance between a boy and a girl of the same age living in a house together.
It's definitely a more developed version of Parallel, so give this a try if you're willing to try Parallel.
This is rather lenghty though, but stick through for the 90 chapters, you might get bored, but don't give up until you've broken through 90 chapters!
As for Pastel fans?
Ane Doki! is definitely going to be enjoyable for you. Wonderful art, very fun read too.
In both manga, a boy meets a beautiful girl, and somehow ends up living with her as well as her little sister. There is comedy, in addition to ecchi, in both series. There is also a romantic love triangle element present in both Ane Doki! and Pastel. Furthermore, a large portion of their story takes place either at school or home. Moreover, the protagonists like the heroine and another girl before meeting her (causing the love triangle).