From ADV:
Ahiru wishes to become a beautiful ballerina, but her two left feet always get in the way of her dreams. All of that changes when she is given a magical pendant and is suddenly transformed into Princess Tutu, a graceful dancer who is lighter than air. But not all is well for the crowned princess of pirouettes. The boy of her dreams has a broken heart, and Tutu must collect the shattered pieces to make her beloved Mytho whole again, before a darker dancer takes his heart away forever.

From Seven Seas:

During a fateful visit to Tsunojo Girls' School, Chika Matsusato meets the girl of her dreams--cool upperclassman Haruna Kanzaki. Even though they spent only one short day together, Chika will never forget Haruna's kindness, and has made it her life's goal to study hard and get accepted into Tsunojo Girls' School so that they can be together. But will Haruna share Chika’s feelings...?

From Lililicious:

Cat's Eye Hall is a mysterious shop that exists to guide lost hearts. If your heart is lost, follow a black cat and you might just end up here...

In the Nekomedou Kokoro Tan series:

V.1 - Yuri Shinjuu (A Yuri Double Suicide)
- A Yuri Double Suicide
Shiho and Hiyori think they can only be together in death. But as they're looking for a place to commit suicide, Hiyori disappears and Shiho follows a cat to a mysterious shop called the Cat's Eye Hall.
- Beautiful, Cruel Pride
- Hana ga Chittemo
- Shitataka de Ite Bukiyou na
- Kaminagahime

V.2 - Shoujo Hakumei
- Shibaru Ito
- Stella Maris
- Satou Kashi wa Yume wo Miru
- Amai Moumoku

V.3 - Renai Higan

Mei Miyama, a second-year student at Saint Anemone Private Academy, is forced to clean the school church as punishment for being late, when she stumbles upon a secret room. She opens up the large coffin inside, and out emerges Aldi Alto. He looks just like a vampire with his red eyes and white hair. From that day forward he claims Mei as his bride and won't leave her alone! This is a heart-racing love story about a demon and an average high-school girl!!

from Renta!

Fujisako Aiko is a nice but somewhat solitary girl attending the beautiful and isolated Enishida Academy, a boarding school on a lush, walled-off island. One day while wandering through the island's woods, she peeks out from behind some trees to to see two foreign-looking girls around her age in a forest clearing.

One is cold and pretty. Another is cheerful and happy. In spite of their differences, Aiko soon finds out they are sisters from a royal family from another kingdom! Swept up into their luxurious surroundings and their large household of brothers and sisters, she is happy with her new friends. But what is this subtle wrongness she senses from time to time? And how come she feels so drawn to the obsidian eyes of the coldest sister of them all?

Wagashino Azuki, training secretly deep in the mountains. She's too clumsy and air-headed to be a ninja, but somehow Azuki ends up as the bodyguard of the heir to a financial empire! 3 mysterious girls also appear. How is this mission going to turn out!?

Ninja Action Manga & High School Love Comedy, all in one!

Kazuomi clones his beloved childhood pets, only to have them return to life in human forms. Having looked forward to the nice low-maintenance cat and dog he remembered, Kazuomi is rather annoyed. After his life is turned upside-down by kindergarten-aged girls with the mentality (and human graces) of your average housepets, Kazuo gets angry and treats them coldly. Will Kazuomi learn to love the fluff again? Will his rival succeed in usurping his place as the coolest guy in school? Will Kureno stop chasing butterflies long enough to accomplish anything?