Chizuko Mikano is living with her aunt and uncle who are slowly poisoning her. However, her sharp intuition allows her survive long enough for the thief Twenty Faces, by chance there to steal the Anas…

Chizuko, now nicknamed "Chiko", is introduced to the rest of thieves, who gradually warm up to her and her determination not to be a hinderance. The group is forced to abandon when the police, who wer…

Chiko helps out with the domestic chores of the thieves, including cooking meals. Twenty Faces arranges for the group to explore and recover something important from a sunken underwater fortress, only…

As the thieves continue to train Chiko in various skills relating to their line of work, Chiko has yet to participate in any missions. When Ken is injured, Chiko steps up, despite the reservation of s…

Twenty Faces' group work as circus performers in a local town, with Chiko starring as tightrope walker Lily, as a cover to gather information and steal an artifact known as the Clock of the Magi. Duri…

The gang is on a train returning back to their hideout after successfully stealing the Clock of Magi. Tiger and his gang (including Angie who deceived Chiko into thinking she was her friend) all of Tw…

Chiko, remains shocked and depressed, returns to her "home" after being "rescued" by Akine, a detective hired by her aunt. There, her aunt continues to poison her while a new maid called Tome is now C…

Chiko slowly settles into a normal life at school and makes friends, though the excitement craving Shunka remains adverse to Chiko. Meanwhile, Uncle Genji, an old family friend of Chiko's, asks for Ak…

Chiko's aunt further plots Chiko's demise with her lawyer. Shunka finds out about Chiko's experience with Twenty Faces and offers that the two become detectives and search for Twenty Faces. Ken, who i…

Chiko uses an movie shoot as an excuse to visit "White Hair Island", where she may find information regarding Twenty Faces. Upon entering the island, Chiko spots Ken whom she had thought dead. Later, …

Chiko and Shunka visit Shunka's summer home by the beach. It becomes clear that Shunka it obviously disturbed by a past experience at the home, but follows through with the trip regardless. Eventually…

Chiko, still on the run, encounters Akechi, who is still searching for Twenty Faces. To save her friends, Chiko goes to the island with Twenty Faces' first hideout to confront the White Haired Devil. …

The White Haired Devil kidnaps Chiko, forcing Twenty Faces and Ken to chase after her and onto an airship. Meanwhile, the real Akechi appears and finds Akine, Tome, and Shunka bewildered but alive and…

After Ken tells Chiko that Twenty Faces likely lived from falling from the airship, the two move to pilot the airship. People on the airship who had been poisoned wake up as they had not been poisoned…

Now living in their own mansion, Tome invites Shunka over to visit. As Shunka continues to express her fantasy of the "Detective Girls", consisting of herself, Chiko, and Tome, Tome becomes suspicious…

Chiko has found a "secret spot" which she now visits regularly (as stated by Shunka). While there one day, a man she's never seen before is sitting alone. He tells her about the memories the hill brin…

Chiko goes with Kouhei, leaving a note on her bed for Tome that she will "definitely be back". Ken sees Chiko in the car and follows but is attacked by a girl who is very much like the boy who attacke…

Twenty Faces and Kouhei go head to head. Twenty Faces manages to distract Kouhei long enough to let Chiko rescue Shunka, only to be captured by the emotionless girl/weapon. Ken and Dr. Kayami meet up …

Twenty Faces and Chizuko escape from the research facility. As Chizuko goes to see the destruction caused by the "Fourth State of Water," Kohei shows up on a rooftop, and while claiming to be Twenty F…

Chizuko, Ken, and Dr. Kayami Head towards the tower to stop Kohei and meet up with Twenty Faces. When almost there, the genetically enhanced children fire a rocket at the airship. Chizuko hops off ont…

Three years have passed. Shunka goes to visit Chiko in England. There is a killer on the loose in the city, and Shunka finds out Chiko seems to have lost interest in playing detective. Chiko says she …