There is an Official website now.

Here is a photo of who is playing whom.

Top:

Sachiko-Oneesama: Haru

Yumi: Honoka Miki

Rosa Chinensis: Hirata Kaoru

Rosa Gigantea: Takizawa Karen

Rosa Foetida: Akiyama Nana

Bottom:

Rei-Oneesama: Sakata Rikako

Shimako-san:  Takada Riho

Yoshino-san: Miyake Hitomi

Tsutako-san: Hirose Alice

Kashiwagi Tsuguru: Usui Masahiro (D-BOYS)

Looks like this dude might play a bigger role in the movie than he’s worth(He is Sachiko’s fiancée) seeing as he is listed n the cast. He had better be gay for Yuki(Yumi’s brother) like how it is or so God forgive me I’ll….

His surname is Kashiwagi and he is gay for Yuki – Kashiwagi Yuki, get it? Is this awesome?

What a great cast! I totally know all the girls.

More Photos: (Thanks to various sources)

Looks like Sei is already at it. I am expecting great stuff from her.

Release date is pushed to 2011 ?!!

Oh well, all the more to enjoy it!