Unbreakable Machine-Doll OVA is a oVA anime that premiered in winter 2014, produced by Lerche.

About the production: the story comes from a light novel, there are 6 episodes of about 5 minutes and its current status is "finished".

Its main genres are action, ecchi and fantasy, with themes such as Revenge.

On AniList, Unbreakable Machine-Doll OVA has an average score of 64%, an average score, and appears on 10,286 users' lists.

OVAs to be included in the BD and DVD volume releases of Kikou Shoujo wa Kizutsukanai. Volume 1: "Soshite Futari wa Manabisha e (Then The Two Goes to Learning Dorm)" Volume 2: "Irori, Rotenburo de Sosou suru (Irori being Careless at Open Air Hot Spring)" Volume 3: "Char and Frey, Senritsu no Bathroom (Charlotte and Frey, Fearsome Bathroom)" Volume 4: "Akabane Nadeshiko, Natsu no Yo no Yume (Nadeshiko Akabane's Midnight Dream)" Volume 5: "Kojin Jugyou: Imishitsu de Bijo Futari to~ (Private Lesson: Alone In the Nurse Room with the Pretty Lady)" Volume 6: "Bishoujo Shuugou! Mizugi Darake no Daisoudou (Pretty Girls Gathered! The Great Tumult of Full of Swimming Suits)"

Official synopsis from AniList.