Also known as: 機巧少女は傷つかない
Unbreakable Machine-Doll
A light novel series by Kaitou Reiji, with illustrations by Ruroo. It was adapted into an anime in 2013, and has a manga adaption by Takashiro Kei. The plot revolves around Akabane Raishin, who enrolls in the Walpurgis Royal Academy of Machine Arts with his living automaton Yaya (Machine-Doll) to seek knowledge and revenge.