 If you liked
Kiss x Sis
|
 ...then you might like
Haiyore! Nyaruko-san
|
Girls/Girl trying to seduce guy...
Dissimilarities:
Haiyore! Nyarko-san is less perverted than kiss x sis,
Kiss x sis has the incest thing while Nyarko has sudden girl show up thing.
Nyarko has Action as extra genre.
Though if you're into like "all girls like one guy and try win him" thing (and a bunch of ecchi scenes) you'll like this one :P