From Tokyopop:
In the year 2068, the Brain Computer, created by humans to be the core of a machine-driven Earth, itself creates Leave, an android that far surpasses the abilities of humans. With mankind now an unnecessary aspect of the Earth ecosystem, Leave, along with her 'father' Fenrir (the human scientist who raised her), destroys humanity and in its stead creates the four 'Mothers' who in turn create an android race modeled on Leave known as the Selenoid.
They divide the world into four parts, each ruled by a Mother, and then further sub-divide the android population into hierarchical levels with the strong at the top and the weak at the bottom. A virtually perfect society ...
And it would have remained perfect if some of the surviving humans hadn't formed a revolutionary group together with some of the lower caste Selenoid with the explicit purpose of overthrowing Leave and delivering the Earth back into the hands of the humans.

The manga is based on THE iDOLM@STER music rhythm game, in which the player guides nine idol singers as their producer.

(from Animenewsnetwork)

From Divine Sanctuary:
The story begins with the death of a young girl. To find the reason why she needed to die, 3 good looking girls and a detective try to find a killer who seems to know something about it. But did she really die? And since one of the girls looks exactly like the dead girl...will they succeed to find that man...? And can the detective protect the double?

Four Years have passed since the resolution of the "JS" incident of Urban Terrorism. The "sixth Mobile Unit" has already been dissolved. It's ace of aces, First Class Captain Takamachi Nanoha has finally found time to rest her wings. A new generation is being raised. This is the tale of the only daughter of the former ace of sky, Takamachi Nanoha. A vivid tale of Takamachi Vivio

From Del Rey:
Cyan is a teenage cat (in cat years!), and when his beloved young master falls ill, the parents abandon Cyan in the basement of a luxurious apartment building. Now Cyan finds himself smack-dab in the middle of the biggest feline territorial battle in Japan.
While waiting for his owner to return and reclaim him, Cyan has to brave the attacks of vampy Siam and the beautiful killer Kline. He also must try to fit in with the group of oddball strays who reside in the basement, a cat gang named the Free Collars!