No. 6

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. An anime television series adaptation by Bones began airing in Japan in July 2011.

Plot
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. 4 years later, Shion experiences a spate of incidents around him in which a deadly infection by parasitic bees leaves its victims to age rapidly. Not willing to be confined inside an adjustment facility for the rest of his life, he decides to run away from the city, and to the slum-filled West Block, where he meets Nezumi once again.