I'm not an otaku, but I've read some manga that are quite entertaining. Oreimo isn't one of those.

Kirino is a 14-year-old sex fantasy ... or maybe she's a nightmare. Her 17-year-old brother Kyousuke doesn't think much of her in the story's opening pages -- in fact, they've ignored each other for years -- although he acknowledges that she's hot. When he finds a risqué anime DVD in the house, he sets out to prove it belongs to Kirino. She doesn't want to admit she's an otaku, but when Kyousuke finally confronts her (which, I suppose for cultural reasons, he does indirectly), Kyousuke discovers that Kirino has a "little sister complex." Not being a student of Japanese anime, I turned to the tvtropes website to discover "little sister" refers to cute, sexy little girls who are the subject of fetishes, frequently involving little sister/older brother romance, in which the older brother tends to be clueless about the little sister's sexuality ... until, you know, the incest starts. Kirino, however, says she knows the difference between fantasy and reality ... there's no incest here.

If Kirino actually got it on with Kyousuke, the story would have been twisted but interesting. As it stands, the story is often dull. Somehow Kirino has gotten a job modeling for a magazine, she's a top student, and she's a skilled athlete. When Kyousuke learns these facts, he begins to admire (or at least respect) his little sister. Kyousuke helps Little Miss Perfect with her various (trivial) problems despite the fact that she's an ungrateful and obnoxious brat, and their travels take them to other devotees of anime who spend a lot of time chatting. This caused me to spend a lot of time yawning. More interesting is a subplot -- will Kyousuke get it on with his study partner? -- but Kyousuke seems determinedly asexual, the dullest teen on the planet. None of this is remotely funny or dramatic.

The artwork is typical of the form. I have to say that I couldn't tell the cute girls from the ordinary girls -- they all looked like manga girls to me. We get to see a lot of Kirino in her panties (with close-ups views of both front and back) which might be interesting to a 14-year-old boy, but Oreimo doesn't even work as soft core porn. It's just too dull.

A cute series but a little weird. However, this was a good start to the series and I want to see where it goes from here.