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