Nijū Mensō no Musume

Nijū Mensō no Musume (二十面相の娘, lit. "Daughter of Twenty Faces") is a manga series written and illustrated by manga author Shinji Ohara. The manga was serialized in the seinen manga magazine Comic Flapper between 2002 and 2007, but continued serialization in the same magazine with the title Nijū Mensō no Musume Utsushiyo no Yoru since October 5, 2007. An anime adaptation aired in Japan from April 12, 2008 to September 27, 2008 and was co-produced by Bones and Telecom Animation Film.

Plot
Chiko is the daughter of the wealthy Mikamo family who has to live with her aunt and uncle after her parents passed away. Because her aunt wants to inherit the Mikamo family's wealth, she gives Chiko poisoned food. One day, however, she's kidnapped by the Nijuu Mensou (20 Faces) and decides to join his clan.

Official
Nijū Mensō no Musume Japanese

Other Sources

 * Nijū Mensō no Musume
 * AnimeNewsNetwork