 An original net animation (ONA) adaptation by Picture Magic, titled , was streamed on Nico Nico Douga between April 19, 2008 and November 25, 2008.The series uses three pieces of theme music, one opening and two endings.The opening theme is by Azusa Kataoka, Mariya Ise, Yoshino Nanjou, Sakura Nogawa, Mai Kadowaki and Rina Hidaka.