Unbreakable Machine-Doll (Kikou Shoujo wa Kizutsukanai) is an action-packed fantasy anime set in an alternate early 20th century where “Machinart”—the art of creating and controlling automated dolls—is a prestigious discipline. The story follows Raishin Akabane, a puppeteer from Japan who attends the Walpurgis Royal Academy of Machinart. He seeks revenge for the death of his family, accompanied by his doll, Yaya, who is deeply devoted to him. The series blends tournament-style battles, harem romance, and dark conspiracy as Raishin navigates the academy’s challenges.
The series is defined by its core themes: a power system rooted in the bond between puppeteer and doll, where the strength of their connection determines their combat effectiveness. Raishin is a quintessential underdog—a foreigner and a newcomer who is initially dismissed by his peers, but who proves his worth through his strategic brilliance and the unwavering loyalty of his partner. Unbreakable Machine-Doll masterfully subverts expectations by presenting what appears to be a simple battle harem and gradually revealing a darker narrative about revenge, identity, and the true nature of the Machinart. It is a series that understands the power of a bond.
For fans of Unbreakable Machine-Doll, finding similar anime can be a challenge. The series occupies a unique space—part battle academy, part harem romance, part dark fantasy. Yet, many underrated series share its core DNA: a focus on a male protagonist who forms a partnership with a powerful female fighter, an exploration of a unique power system based on bonds or partnerships, and a willingness to blend action, comedy, and dark themes. These shows deserve far more attention for their entertainment value, their character development, and their refusal to provide easy answers.
Here are 15 underrated anime that capture the spirit of Unbreakable Machine-Doll.
1. Chivalry of a Failed Knight (2015)
- Streaming Availability: Crunchyroll, Hulu
- Rating: MAL: 7.4
- Episodes: 12
- Studio: Silver Link, Nexus
- Notable Staff: Based on the light novel series by Riku Misora.
Plot Summary: Ikki Kurogane, a student branded a “Failed Knight” due to his low magical power, refuses to give up on his dream. He relies on his honed swordsmanship and strategic brilliance to overcome opponents.
Similarities to Unbreakable Machine-Doll: Both are about a male protagonist who is underestimated by a flawed system despite possessing immense skill. The focus is on the strategic application of abilities and the bond with a talented female partner. The series is a heartfelt, action-packed underdog story.
2. The Asterisk War (2015)
- Streaming Availability: Crunchyroll
- Rating: MAL: 6.9
- Episodes: 12 (Season 1)
- Studio: A-1 Pictures
- Notable Staff: Based on the light novel series by Yuu Miyazaki.
Plot Summary: Ayato Amagiri transfers to Seidoukan Academy, a school where students with special abilities compete in tournaments. He must find a partner and navigate the political landscape.
Similarities to Unbreakable Machine-Doll: Both are set in elite academies where students with unique powers compete in structured tournaments. The focus is on the partnership between the male protagonist and a talented female fighter. The series is a blend of action, comedy, and romance.
3. Absolute Duo (2015)
- Streaming Availability: Crunchyroll, Funimation
- Rating: MAL: 6.4
- Episodes: 12
- Studio: 8-Bit
- Notable Staff: Based on the light novel series by Takumi Hiiragiboshi.
Plot Summary: Tooru Kokonoe, an unusual student who manifests a shield instead of a weapon, enrolls at Kouryou Academy. He must partner with Julie Sigtuna, a mysterious girl.
Similarities to Unbreakable Machine-Doll: Both are set in a school where students manifest weapons and must form partnerships to compete. The focus is on the bond between the male protagonist and a central female character, with a blend of action and romance.
4. The Irregular at Magic High School (2014)
- Streaming Availability: Crunchyroll, Funimation, Hulu
- Rating: MAL: 7.4
- Episodes: 26
- Studio: Madhouse
- Notable Staff: Based on the light novel series by Tsutomu Satou.
Plot Summary: Tatsuya and Miyuki Shiba enroll at First High School. Tatsuya is placed in the “Weed” class for students with low practical magic scores, but he possesses immense technical knowledge.
Similarities to Unbreakable Machine-Doll: Both are set in a school for individuals with supernatural abilities, where the male protagonist is initially underestimated. The focus is on the strategic application of abilities and the bonds with classmates. The series is a blend of action, drama, and political intrigue.
5. Infinite Stratos (2011)
- Streaming Availability: Crunchyroll
- Rating: MAL: 6.7
- Episodes: 12 (Season 1)
- Studio: 8-Bit
- Notable Staff: Based on the light novel series by Izuru Yumizuru.
Plot Summary: Ichika Orimura is the only male in the world who can pilot an “Infinite Stratos,” a powerful exoskeleton. He enrolls in a school filled with female pilots.
Similarities to Unbreakable Machine-Doll: Both are harem action series set in a school for students with special weapons, where the male protagonist is unique or exceptional. The focus is on the relationships with multiple female characters and the tournament-style combat.
6. Undefeated Bahamut Chronicle (2016)
- Streaming Availability: Crunchyroll, Funimation
- Rating: MAL: 6.5
- Episodes: 12
- Studio: Lerche
- Notable Staff: Based on the light novel series by Senri Akatsuki.
Plot Summary: Lux Arcadia, a former prince known as the “Weakest Undefeated,” is forced to become a servant for the girls at an academy while piloting powerful mechs.
Similarities to Unbreakable Machine-Doll: Both are harem action series set in an academy where the male protagonist pilots powerful weapons and is surrounded by female characters. The focus is on the relationships and the blend of action, comedy, and romance.
7. Hundred (2016)
- Streaming Availability: Crunchyroll
- Rating: MAL: 6.1
- Episodes: 12
- Studio: Production IMS
- Notable Staff: Based on the light novel series by Jun Misaki.
Plot Summary: Hayato Kisaragi, a boy with the highest compatibility with the “Hundred” weapons, enrolls at Little Garden academy.
Similarities to Unbreakable Machine-Doll: Both are harem action series set in a school for students with special weapons, where the male protagonist is exceptional. The focus is on the relationships with multiple female characters and the tournament-style combat.
8. Dragonar Academy (2014)
- Streaming Availability: Crunchyroll, Funimation
- Rating: MAL: 6.3
- Episodes: 12
- Studio: C-Station
- Notable Staff: Based on the light novel series by Shiki Mizuchi.
Plot Summary: Ash Blake, a student at Ansarivan Dragonar Academy, is known as the “problem child” because his dragon has never hatched. His life changes when his dragon emerges in the form of a girl.
Similarities to Unbreakable Machine-Doll: Both are set in an academy where students bond with special partners and fight against threats. The focus is on the bond between the male protagonist and his partner.
9. Bladedance of Elementalers (2014)
- Streaming Availability: Crunchyroll, Funimation
- Rating: MAL: 6.6
- Episodes: 12
- Studio: TNK
- Notable Staff: Based on the light novel series by Yuu Shimizu.
Plot Summary: Kamito Kazehaya, the only male elementalist in the world, is forced to attend Areishia Spirit Academy, a school for female elementalists.
Similarities to Unbreakable Machine-Doll: Both are about a male protagonist who is unique in a female-dominated world and must compete in a tournament. The focus is on the harem relationships and the tournament arc.
10. Sky Wizards Academy (2015)
- Streaming Availability: Crunchyroll, Funimation
- Rating: MAL: 6.3
- Episodes: 12
- Studio: Diomedéa
- Notable Staff: Based on the light novel series by Yuu Moroboshi.
Plot Summary: Kanata Age, a former ace wizard who has fallen from grace, is assigned to teach a team of three troublesome girls at the Sky Wizards Academy.
Similarities to Unbreakable Machine-Doll: Both are set in an academy for individuals with special abilities, where the male protagonist is an underdog who must prove himself. The focus is on the relationships with multiple female characters.
11. Trinity Seven (2014)
- Streaming Availability: Crunchyroll
- Rating: MAL: 7.1
- Episodes: 12
- Studio: Seven Arcs
- Notable Staff: Based on the manga by Kenji Saito and Akinari Nao.
Plot Summary: Arata Kasuga, a boy whose cousin disappears in a magical incident, enrolls in a magic academy to find her. He meets seven powerful female mages.
Similarities to Unbreakable Machine-Doll: Both are about a male protagonist who enters an academy and is surrounded by powerful female characters. The focus is on the harem relationships and the development of abilities.
12. Aesthetica of a Rogue Hero (2012)
- Streaming Availability: Crunchyroll, Funimation
- Rating: MAL: 6.7
- Episodes: 12
- Studio: Arms
- Notable Staff: Based on the light novel series by Tetsuto Uesu.
Plot Summary: Akatsuki Ousawa, a hero who defeated a demon king, returns to Earth with the demon king’s daughter. He enrolls in a school for those who have returned from other worlds.
Similarities to Unbreakable Machine-Doll: Both are about a male protagonist who is incredibly skilled but underestimated, and is surrounded by female characters. The focus is on the harem relationships and the blend of action and comedy.
13. Campione! (2012)
- Streaming Availability: Crunchyroll
- Rating: MAL: 6.8
- Episodes: 13
- Studio: Diomedéa
- Notable Staff: Based on the light novel series by Jou Taketsuki.
Plot Summary: Godou Kusanagi, an ordinary high school student, kills a god and becomes a “Campione,” a god-slayer with immense power.
Similarities to Unbreakable Machine-Doll: Both are about a male protagonist who gains immense power through an unexpected event and is pursued by powerful female characters. The focus is on the harem relationships and the blend of action, comedy, and romance.
14. The Legend of the Legendary Heroes (2010)
- Streaming Availability: Crunchyroll, Funimation
- Rating: MAL: 7.5
- Episodes: 24
- Studio: Zexcs
- Notable Staff: Based on the light novel series by Takaya Kagami.
Plot Summary: Ryner Lute, a lazy but brilliant mage with cursed eyes, and Ferris Eris, a skilled swordswoman, embark on a quest to find legendary relics.
Similarities to Unbreakable Machine-Doll: Both feature a powerful protagonist with a special ability who must navigate political intrigue and the bonds with companions. The focus is on the cost of power and the burden of destiny.
15. Date A Live (2013)
- Streaming Availability: Crunchyroll, Funimation
- Rating: MAL: 7.2
- Episodes: 12 (Season 1)
- Studio: AIC Plus+
- Notable Staff: Based on the light novel series by Koushi Tachibana.
Plot Summary: Shido Itsuka must date and seal the powers of “Spirits,” mysterious beings who cause spatial quakes.
Similarities to Unbreakable Machine-Doll: Both are about a male protagonist who must form bonds with powerful female characters to achieve his goals. The focus is on the blend of action, comedy, and romance.
Why These Anime Work for Unbreakable Machine-Doll Fans
Fans of Unbreakable Machine-Doll are drawn to stories that blend battle academy action, harem romance, and dark fantasy themes. They appreciate a narrative that focuses on a male protagonist who forms a partnership with a powerful female fighter, and they are invested in the relationships and the comedic and dramatic situations that arise. They are not looking for complex philosophical narratives, but for fun, entertaining stories that make them smile.
The anime listed above all share this fundamental DNA:
- The Partnership: Whether it is the puppeteer-doll bond of Unbreakable Machine-Doll, the Duo system of Absolute Duo, or the Limiter-Pandora bonds of Freezing, these series understand that the bond between partners is central to unlocking true strength. The focus is on the trust, loyalty, and respect that develops between partners.
- The Underestimated Protagonist: The protagonists are often initially dismissed or underestimated, but they prove their worth through skill and determination. Their journey is one of earning respect and finding their place.
- Subversion of the Harem Genre: These series use the framework of the harem genre to explore deeper themes of identity, power, and responsibility. They understand that the most compelling stories are not just about choosing a partner, but about the bonds that form along the way.
These 15 anime, like Unbreakable Machine-Doll, are not afraid to be entertaining. They are underrated gems that offer a fun, action-packed, and emotionally resonant experience for viewers who are looking for stories about the power of partnership, the bonds of friendship, and the thrill of competition.
