Kokoro LibraryKokoro Library.

Kokoro Library (ココロ図書館, Kokoro Toshokan) is a slice-of-life Japanese manga series by Nobuyuki Takagi and Yōsuke Kuroda, originally serialized between April 2000 and July 2002 in Monthly Comic Dengeki Daioh. It follows the peaceful daily lives of three sisters who live in a library. The manga was adapted into a 13-episode anime television series directed by Koji Masunari, who is also known as the director of the anime OVA series Read or Die (2001) and Kamichu!