Mayoi Neko Overrun

If Kaichou wa Maid-sama is a fujoshi show, Mayoi Neko Overrun is the opposite. It hasn't got a ton of fan service, but it's definitely there. The main character, Takumi Tsuduki is the childhood friend of one main heroine, Fumino Serizawa, and the adopted younger brother of Otome Tsuduki, who runs the Stray Cat patisseire where he works. He is often in charge, as Otome is frequently out of town. Both Takumi and Fumino are technically orphans.

The other heroines are Chisa Umenomori and a mysterious cat girl that Otome brings home at the end of the first episode, but is not yet named.

So far, there's really not much of a storyline started, so it's hard to tell how it will turn out. Although, the only way Fumino could be more tsundere is if she was voiced by Kugimiya Rie.