Shion no Ō (しおんの王, Shion no Ō? lit. Shion's King), subtitled The Flowers of Hard Blood, is the title of an ongoing Japanese mystery manga written by Katori Masaru and illustrated by Jiro Ando. It is published by Kodansha in the seinen manga magazine Afternoon, and has been collected in eight bound volumes as of May 2008. It has been adapted as a twenty-two episode anime television series by Studio Deen, which began airing in Japan on October 13, 2007. A video game for the Nintendo DS will be released on April 10, 2008 by Mainichi Communications.