Kei no Seishun (Japanese: ケイの凄春, "Kei, Chronicle of Youth") is a Japanese manga series written by Kazuo Koike and illustrated by Goseki Kojima.

It was serialized in Futabasha's Seinen manga magazine Weekly Manga Action from April 1978 to December 1980, with its chapters collected in fourteen tankōbon volumes.

Written by Kazuo Koike and illustrated by Goseki Kojima, Kei no Seishun was serialized in Futabasha's Seinen manga magazine Weekly Manga Action from April 13, 1978,[2][3] to December 18, 1980.

[4] [5] Futabasha collected its chapters in fourteen tankōbon volumes, published from November 1978 to March 1981.

[6][7] Futabasha republished the series in ten aizōban volumes from April to August 1989.