No. 6 is a nine-volume novel series written by Atsuko Asano and published by Kodansha between October 2003 and June 2011. A manga adaptation drawn by Hinoki Kino began serialization in the March 2011 issue of Kodansha's Aria magazine. A TV anime series adaptation by Bones began airing in Japan in July 2011.
The story takes place in an ideal city known as "No. 6". Shion, a boy raised in the elite and privileged environment of his home, gives shelter to another boy, who only gives his name as 'Nezumi', during the former's 12th birthday. After spending a rainy night with his new friend, Shion discovers the next morning that Nezumi has left and disappeared without a trace. Four years later, Shion experiences a spate of incidents around him in which a deadly infection by parasitic wasps leaves its victims to age rapidly. Shion's co-worker is one of the victims and Shion is arrested on suspicion of murder. Whilst Shion is being transported to the Correctional Institute, Nezumi appears and rescues him. Shion begins to find out the hidden truth behind the Ideal City No.6.
Shion (紫苑) Voiced by: Yūki Kaji
Nezumi (鼠) Voiced by: Yoshimasa Hosoya
Youming (楊眠) Voiced by: Shinichiro Miki
Inukashi (犬貸手) Voiced by: Kei Shindou
Rikiga (力河) Voiced by: Masaki Terasoma
Safu (沙布) Voiced by: Kiyono Yasuno
Lili(莉莉) Voiced by: Sumire Morohoshi
Karan(火藍) Voiced by: Rei Sakuma
Safu's Grandmother (沙布の祖母) Voiced by: Miyoko Shouji
Yamase (山勢) Voiced by: Daisuke Hirakawa
Ann (アン) Voiced by: Ayahi Takagaki
Betty (ベティ) Voiced by: Chika Fujimura
Karan (Rico's sister) (カラン) Voiced by: Megumi Nakajima
Rico (リコ) Voiced by: Yuka Nishigaki
Roy (ロイ) Voiced by: Kiyotoka Furushima
No. 6 began as a novel series written by Atsuko Asano. Nine tankōbon volumes were published by Kodansha between October 10, 2003 and June 14, 2011. Kodansha began publishing bunkobon versions of the novels on October 13, 2006; as of August 12, 2009, five bunkobon volumes have been released.
A manga adaptation drawn by Hinoki Kino began serialization in the March 2011 issue of Kodansha's shōjo manga magazine Aria.
An anime TV series adaptation produced by Bones and directed by Kenji Nagasaki will begin airing in Japan on Fuji TV's noitaminA programming block on July 8, 2011. The anime's opening theme is "Spell" by Lama and the ending theme is "Rokutōsei no Yoru" (六等星の夜) by Aimer. An english version of No.6 is to debut on DVD with Japanese subtitles and English Dub on August 21, 2012.