This is about Kuroneko's love story with her best friend's brother.
PS: The "Oreimo" manga is the prequel to this "Oreimo Kuroneko" story.
Story: A fairly straight forward romance between a girl and her friend's brother Kyousuke, which she's in love with. If you've seen the anime, then this is all new territory, since Kuroneko is the heroine all the way.
Art: Absolutely outstanding. The characters look different from most manga I've seen, but it's really cute and there's no complains about it, considering it's a romantic comedy. (Mayo Chiki is a lot cuter though ^_^)
Characters: Considering the adorable Kuroneko is the heroine, instead of the tsundere
little sister, the characters are much more enjoyable in this story. So there's really no complaints. Kyousuke is mature, yet not too much. The friends are all really likable and gives depth to the story.
Overall, I like Kuroneko and Kyousuke, so it was quite relaxing to see their romance develop and turn into something serious. Some might dislike the lack of little sister incest (lol), but the title is self explanatory. This is a completely different story than the anime. And it's better.
+ Likable Heroine
+ Actual Romance (not just a kiss in the last chapter)
-+ Different from the anime, no little sister heroine