Bloody Monday(ブラッディ・マンデイBuraddi Mandei) is a Japanese manga series written by Ryō Ryūmon and illustrated by Megumi Kouji. The series had been serialized in Weekly Shōnen Magazine by Kodansha from April 2007 to May 2009, with individual chapters collected into eleven tankōbon volume as of May 15, 2009, and a total of 96 chapters altogether. The manga has also been adapted into a drama series, which aired on October 11, 2008, starring Haruma Miura. The second season of the manga began in Weekly Shōnen Magazine number 46 released on October 14, 2009, and the second season of the drama adaption began airing on January 23, 2010.