 A "Rakka Ryūsui" light novel, written by Hiro Akizuki and illustrated by Ikki Sanada, was published by Houbunsha on July 27, 2007.On March 25, 2009, a drama CD called "Rakka Ryūsui drama CD" was released in Japan.A "Rakka Ryuusui" Variety CD was released at Comiket 76 on August 14, 2009.