It looks more like anime designs than Hidari artwork... Yep, I'm going to say it's anime designs.
Looks absolutely wonderful. We finally have a winner for adapting Hidari's designs!

Also I forgot to mention this before, but since Aniplex is on this, what are the chances that Iwakami is the producer? We might have another potential Monogatari/Madoka here.

Hmm ... this one looks a bit more interesting with the updates, but ... hmm. I am still having some difficulty wrapping my head around the overall plot and/or what "happens" in the story, for some reason. :\

This is kind of light novel that Shaft loves - anything that has trolling in story.

Full page with the previous announcement:
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It says that the main cast will be announced at an event on the 18th.

Edit: also a PV was shown at C82, nothing special though:
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I'm quickly glancing at the page, and am I wrong in assuming that the '9' and '31' are the ages of the girls? Because WTF, the left girl looks to be 31 and the right girl looks to be 9. :eyebrow:

Ah, maybe I should have cut that part off and left it as a surprise... :heh: (would've been revealed in anime character bios sooner or later anyway)
Yes, those ages are correct. 31 year old loli and 9 year old busty girl. Just another one of the many oddities this series contains. At least Kagami looks like a normal 16 year old.

We have character design by RomioXJuliet and... Yugioh Zexal. Not sure if he is capable. Only thing I expect from this series is Hidari illustration actually being portrayed as animation, not like Fractal S***.

Congrat getting trolled by synopsis. There are a lot of grotesque in this novel.

Also, it's not vaguely incestuous relationship. Sister already 'loves' his bro.

I think Hiroki Harada could deliver a nice chara design. Harada is a pretty good animator who has a great sense of feminity. He knows how to put cuteness into his female characters with body movements, pose & body animation. His recent episodes as animation director (Working 6 or Im@s 3) or his cuts (Popura in Working 6 or Menma in AnoHana OP) showed it. He isn't as talented as Asako Nishida but he could surprise us.
Hidari's an illustrator I really appreciate as many here and I think one of his strengths is his great use of colors so I guess color setting will be also an important matter for this anime character design.
I wonder if Shaft will include a series director to handle this series. I'd have chosen Yukihiro Miyamoto for this kind of series but he's certainly busy with Madoka.
Concerning this series itself I'm kinda interested since I enjoyed the author's previous work (Kyouran Kazoku Nikki).

Ah, so this is from KKN's author. I was going to watch it because it was Shaft, but that's all the more reason. KKN was one of the first anime I paid attention to, and probably played a part in me liking anime with a more absurd bent.

Interview with producer Tanaka Junichiro (TBS) from Maker Oudan Anime Guide 2012 Summer.

http://i.imgur.com/VklMfm.jpg
Click to enlarge

The interesting bit:

Q: Anything you have to be particular careful for the anime adaptation? Also please tell us some backstory about the production.
A: We'll make the best use of each character's traits since they all have interesting personality! We won't change the story's basis, you will be able to enjoy the anime whether you come from the original work or from watching anime. I'll also have SHAFT work harder than usual on character design and coloring.

Producer Tanaka is also the one responsible for Hidamari Sketch and Denpa Onna.

Start in January 2013

Kana Hanazawa is in the cast \o/

http://yaraon.blog109.fc2.com/blog-entry-11344.html

Sasami Tsukuyomi: Kana Asumi (Yuno from Hidamari Sketch)
Kamiomi Tsukuyomi: Hochu Otsuka (Shiro from Arakawa Under the Bridge)
Tsurugi Yagami: Chiwa Saito (Hitagi from Bakemonogatari, Stella from Arakawa Under the Bridge, Homura from Madoka Magika)
Kagami Yagami: Kana Hanazawa (Nadeko from Bakemonogatari)
Tama Yagami: Ai Nonaka (Kafuka from Sayonara Zetsubo Sensei, Kyoko from Madoka Magika)

SHAFTish as usual

That's a 120% SHAFT cast right there. Kana Hanazawa as Kagami was so obvious as a typecast that I was almost expecting her not to be it... :heh: Looking forward to January!

With Ai Nonaka on the cast, I'll definitely be keeping my eyes on this.

Amazing cast.

I want to hear Chiwa Saito using her Becky voice for Tsurugi.

SHAFT + great cast = profit.

This anime is gonna be a lot of fun to watch, that I'm sure of.

Chiwa Saitou. I'm in. But i smell incest here. Uggh.

Typical Shaft casting. I'm pleased.

Such an explosion of SHAFT goodness recently. This looks awesome. Hidamari, Madoka, Kizumonogatari, Prism Nana, and finally Sasami-san@Ganbaranai. I can hardly wait for any of it.