Chiko, Heiress of the Phantom Thief

Chiko, who had been leading a lonely life because her aunt is trying to kill her, is kidnapped by the Phantom Thief Nij?-Mens? (20-Faces) and set out an adventure into the strange world. She gradually changes as she encounters new friends and places. But strange events start happening revolving around the mystery of "Legacy of the 20-Faces". So Chiko has to move forward, regardless on how checkered her life will become.