Zetsumetsu Kigu Shōjo: Amazing Twins (絶滅危愚少女〜Amazing Twins〜, lit. Extinct Device Girl: Amazing Twins) is a two-part original video animation produced by Encourage Films and directed by Junichi Sato. The two parts were released on Blu-ray Disc and DVD on February 26 and June 25, 2014, respectively, whilst AT-X aired them on December 29, 2013, and May 6, 2014, respectively. The opening theme and ending themes are "Zetsumetsu Kigu Shōjo" (絶滅危愚少女) and "Kokoro Asymmetry" (心 アシンメトリー) respectively, both performed by Haruka Chisuga. Source: Wikipedia (en)