The OVA features six separate stories revolving around the cast, some of which border on the bizarre; one of which is an MMORPG environment being played by Konata, Kagami, Tsukasa, and Nanako Kuroi, and another in which Kagami has a suggestive dream about Konata. (Source: Wikipedia)

The Walpurgis Royal Academy of Machinart was founded alongside the development of Machinart, machine magic capable of giving life and intelligence to mechanical dolls subsequently called as automaton. Its aim: train skilled puppeteers to control the automatons, as militaries across the globe have begun incorporating Machinart into their armies. After miserably failing the academy's entrance exams, Raishin Akabane and his humanoid automaton Yaya must defeat one of the top one hundred students to earn the right to take part in the Evening Party, a fight for supremacy between puppeteers using their automatons. The last one standing is bestowed the title of Wiseman and granted access to the powerful forbidden arts. Thus, Raishin challenges Charlotte Belew and her automaton Sigmund to a duel, but before they even begin, Sigmund is attacked by other students. After saving his opponents from their assaulters, Raishin cancels the duel but is forced to search for a new way to gain access to the Party. Driven by the tragedies of his past, Raishin fights alongside Yaya to rise to the top and claim the title of Wiseman.

Original animation to be included in the BD and DVD volume releases of Machine-Doll wa Kizutsukanai. Volume 1: Soshite Futari wa Manabisha e (And So They Arrive at School) Volume 2: Irori, Rotenburo de Sosou suru (Irori Has an Accident at the Open-Air Bath) Volume 3: Char and Frey, Senritsu no Bathroom (Charl, Frey, and the Bathroom of Terror) Volume 4: Akabane Nadeshiko, Natsu no Yo no Yume (Nadeshiko Akabane, Midsummer Night's Dream) Volume 5: Kojin Jugyou: Imishitsu de Bijo Futari to~ (Private Lesson - Two Beauties in an Infirmary) Volume 6: Bishoujo Shuugou! Mizugi Darake no Daisoudou (Pretty Girls Gather! Swimsuit-Stubbed Pandemonium)

In a fantasy version of Europe, a war between enemy countries is brewing. One of these countries, Zhcted, has its seven regions ruled by War Maidens, known as Vanadis. Equipped with powerful dragon-carved weapons, Eleonora Elen Viltaria, one of the Vanadis, launches an invasion against their neighboring rival country of Brune. Eventually, Tigrevurmud Tigre Vorn, a young archer and an earl for Brune's region of Alsace, has his entire army decimated at Elen's hands. In a strange twist of events, Elen spares Tigre, and gives him the order, Become mine! What could be the meaning behind this new alliance? Adapted from the light novel written by Tsukasa Kawaguchi, Madan no Ou to Vanadis is an epic adventure filled with complex war tactics and beautiful women. Trapped in a multinational conflict, Tigre and Elen are swept up in a war filled with dark secrets, conspiracies, and corruption.