Quitting and graduating

Reina put up a brief announcement on her blog:
http://ameblo.jp/tanakareina-blog/entry-11810873314.html　

I'm quitting ＬｏＶｅｎｄｏЯ。

With that mere sentence, she brings us this weighty news. 

Very much like Reina - no frills, no explanations, no room for misunderstanding - just a single sentence.

Also of note: A blog post by Takagi Sayuki, posted earlier on the same day

http://ameblo.jp/juicejuice-official/entry-11810504175.html

Today I、 Takagi Sayuki have something important to say。
I love Tanaka Reina-san、 and I thought I'd work hard in order to become a person like Tanaka-san。
However、as of today, I will be graduating from being a Tanaka-san oshi。
And Tanaka-san、 thank you very much for everything up to now。
There were a lot of times、 when I was able to do my best thanks to Tanaka-san。
From now on、 as I'm a senpai, I'll work hard in order to become a presence that will be admired。

Could this be related to Reina's cryptic announcement? Only time will tell.

*cough*probablyAprilFool's*cough*

EDIT: Also, see this post from Sato Masaki

http://ameblo.jp/morningmusume-10ki/entry-11810982314.html

Translation of relevant bits:

And please listen


Masaki
Actually


Tanasa-tann？ Tanaka-san


I despiーーーse her


Sato Masaki





（please read the portion which follows after once it's past midnight）