 If you liked
Narue no Sekai
|
 ...then you might like
To LOVE-Ru
|
Both have alien girls who fall in love with human guys, and both girls are involved someway with a Galatic government.
Both of these anime are similar that the main heroine in them has arrived from other planet. On the Earth it meets and falls in love with the boy. And as besides the guy gets set of new friends and girlfriends. And because of it some other heroines start to dislike it. :)
In general in these anime there are still more many similar characters and the various situations occuring to them.