Unbreakable Machine-Doll

Unbreakable Machine-Doll (機巧少女(マシンドール)は傷つかない Kikō Shōjo wa Kizutsukanai (Mashin-Dōru wa Kizutsukanai), lit. "Unbreakable Machine Girl") also abbreviated as "UMD"; is a Japanese ongoing light novel series written by Reiji Kaitou and illustrated by Ruroo. The series is published by Media Factory under their MF Bunko J imprint since November 2009, having currently published 14 volumes, and is adapted into an ongoing manga series illustrated by Hakaru Takagi and published by Media Factory under their Monthly Comic Alive magazine since March 2010, having currently serialised 8 volumes, and into a 12-episode anime television series animated by the anime studio Lerche and directed by Kinji Yoshimoto, airing from October 2013 to December 2013.