サンテレビジョン
The first season aired in Japan from January 7 to April 1, 2011 on TBS, with subsequent runs on Chubu-Nippon Broadcasting, Sun Television, Kyoto Broadcasting System and BS-i. The series is licensed in North America by Sentai Filmworks, with Anime Network simulcasting the series on their video website. Six DVD and Blu-ray volumes will be released by Media Factory between March 30 and September 21, 2011. An original video animation, entitled , was released in Japan on DVD and Blu-ray on December 7, 2011.