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Light Novel / Hybrid Heart Magias Academy Ataraxia

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Hybrid x Heart Magias Academy Ataraxia, released in Japan as Masou Gakuen HxH, is a Light Novel series written by Masamune Kuji and illustrated by Hisasi.

The series is set 20 Minutes into the Future. Humanity has been attacked and almost wiped out by giant magitech mechas from another universe, which appear through portals on landmasses above a certain size. The only known survivors live on floating structures called Mega Floats. Humanity's only defense against the invaders are personalized superweapons called Heart Hybrid Gears (HHGs). The story follows Kizuna Hida, a high school student who possesses the Heart Hybrid Gear Eros. His HHG gives him the power to recharge other HHG users' power levels by doing lewd things with them... much to his chagrin when he finds out.

An anime adaptation was created as part of the Summer 2016 anime season.


All spoilers for volumes 1-4 are unmarked and all character tropes must be moved to the proper character page.

This series contains examples of:

  • Adaptation Explanation Extrication: In episode 11 of the anime, when Nayuta is explaining how her magic power plant works, an important piece of information is left out. In the light novel she clarified that she only absorbs half of the energy humans recover in one day, because if she drained more they would die faster and thus less energy will be obtained. The lack of this explanation makes it look like she plans on draining the energy of the inhabitants of Tokyo until they all die.
  • Aerith and Bob: The Batlantis Empire has names like Grabel, Aldea, Zelshione, Ragrus… and Grace.
  • Aliens Speaking English: Communication problems never show up in this series, not even between people who live in different dimensions.
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  • The Alliance: Izgard and Ataraxia eventually form an alliance to take down Batlantis. After the empire is defeated and befriended, they form a new alliance with it and Baldein, this time to defeat the Deus Ex Machina.
  • All Your Powers Combined: The end result of Eros' Power Copying ability, which he uses to completely overwhelm his opponents, and the anime fully realizes this when he uses the powers of all four female members of Amaterasu together against Zelshione and her forces.
  • Almost Kiss: Kizuna and Aine are about to kiss at the end of volume 7 only to be interrupted by the appearance of the new Big Bad Ensemble.
  • Artifact Title: The Ataraxia Academy mentioned in the title disappears from the story after volume 4. It comes back in volume 8… only to lose all significance to the plot again halfway through the volume. Lampshaded by Nayuta in her Breaking the Fourth Wall moment in the prologue of volume 11. According to her, this volume is a Breather Episode because somebody was complaining that Hybrid x Heart Magias Academy Ataraxia isn't really a story about an academy.
  • As You Know: Episode 2 begins with Reiri explaining all about the current state of the world to the students of Ataraxia, who unlike the audience have no reason to not know about it. After all, that is the reason they are even in Ataraxia in first place.
  • Babies Ever After: Discussed at the end of the last volume. The cores inside the bodies of the girls lower the chances of them being impregnated to near zero. However, there is still a small possibility of fecundation being successful, at which point the embryo would expel the core out of their bodies. Before the alternate worlds close permanently, Kizuna had sex with Zeyclone and Grabel, and from that point on he would have to frequently perform Ecstasy Hybrid with the rest of his harem for the sake of their missions.
  • Badass Army: Making friends with your former enemies rather than killing then has its advantages. For example, you can have not one but three different Cool Ship with the most badass characters from each faction as their crew.
  • Bathtub Bonding: Enforced by Kizuna in an attempt to get Yurishia and Scarlet to admit how they really feel about each other and hopefully fix their broken friendship. At the very least it did put them in the right direction.
  • Battle Harem: This series is a World of Action Girls, and most of those girls ultimately fall in love with the main character.
  • Beach Episode: The Electronic Special Short Story of Volume 11, fittingly titled "Time of Seaside School".
  • Beam-O-War: How the duel between Kizuna and Grabel ends. Kizuna wins.
  • Beehive Barrier: Comes standard with Hybrid Gears.
  • Bigger Is Better: The Heart Hybrid Gear of a Physical God is over twice as big as a normal one, and several times more powerful. The HHG that goes through the Next Tier Power-Up also becomes much bigger.
  • Bittersweet Ending: The Deus Ex Machina are defeated and the alternate worlds have been saved. However, all the portals have closed as a result and none of the parallel worlds will be able to interact ever again. Even so, some member of Batlantis chose to stay on Earth with their new friends, and a couple of characters believe they will find a way to open the portals again in the future. Also, Kizuna performs Ecstasy Hybrid (a.k.a. actual sex) with the girls with a possibility that some will inherit his children.
  • Bleached Underpants: Hisasi, the illustrator of the novels, has drawn many erotic dōjinshi and manga in the past.
  • Breather Episode: Volume 11 is composed of short, lighthearted stories about the daily life of Kizuna and the girls. The author actually calls it "a breather" in the afterword of volume 10.
  • Build Like an Egyptian: Osiris's world looks like a copy of Ancient Egypt, but it is actually an Inversion. Osiris is one of the four gods that created our world in first place, and she likely created Egyptian civilization based on her home world, as Kei speculates.
  • Cast from Hit Points: All Hybrid Gears work off the wearer's life energy, but the "-ros" series can actually kill the user if its power runs out.
  • The Cavalry: Volume 2 ends with the American West Coast Mega Float arriving to save Amaterasu from being overwhelmed by the AU fleet.
  • City on the Water: The Mega Floats, which are technically a conglomeration of floating cities that house the remaining survivors of the invaders' initial attacks. Being a floating city also serves a defensive purpose, as the inter-dimensional gates (or "Entrances") that the aforementioned invaders come from can only appear on solid landmasses (at least the size of a large island) and not over water.
  • Clothing Damage: The female members of the Amaterasu Team endure these whenever they take a beating from the invaders when their Hybrid Count is dangerously low. This trope is also prominent in some of the light novels' cover art.
  • Cooldown Hug:
    • How Kizuna finishes his fight with Aine in volume 6. Given her mental state during the events of this volume, it was more effective than any punch.
    • In the following volume, Aine does the same thing to Grace, saving her from her own Sanity Slippage.
  • Cool Ship: Oldium, the flagship of the Batlantis Empire. And then there is the flagship of Baldein that is also the "guardian deity" of the country, Golden Dragon, a dragon-shaped battleship. Finally, there is the flagship of the Izgard-Lemuria alliance, named Ataraxia.
  • Curb-Stomp Battle: The only way to describe Grabel's first battle against Amaterasu and Masters. They couldn't even scratch her.
    • Whenever Kizuna is able to go all-out using Eros' full power, returning the favor to Grabel and completely turning the tables against Zelshione until his power fails when his chest piece breaks. Thankfully, Aine is able to step in with her own special ability to take out Zelshione and the entire Batlantis force with Code Breaker.
  • Deus Sex Machina: Kizuna and his Eros Hybrid Gear can perform the normal "Heart Hybrid" and the more intense "Climax Hybrid" with Aine, Hayuru or Yurishia. Heart Hybrid restores Hybrid Count, while Climax Hybrid allows access to a Super Mode. Taken to high levels of Refuge in Audacity with the "Connective Hybrid." Eventually bypassed altogether with The Power of Love in the anime adaptation, implying the sexual activity is merely a stepping stone to it.
  • Discount Lesbians: Maybe. It's sorta vague since Grabel and Aldea are apparently human but are from another world. Regardless, they're definitely lovers.
    • Played with in that Vatlantis is populated solely by women. Therefore every couple would be a lesbian one. That said, many of the characters are also attracted to Kizuna, meaning they are at least bisexual.
      • The above makes sense in context with the whole "planet of women" thing, as gender is not something most of them are even conscious of. They aren't attracted to Kizuna because of or in spite of his maleness, but because he's The Messiah to both worlds by the end.
  • Ecchi: This is a series where the main character and the girls in his harem actually get stronger when they get to third base. Saying there is Fanservice here is like saying the ocean is wet.
  • Elaborate University High: The Strategic Defense Academy Ataraxia, which doubles as a Military Academy, research center and the Japan Mega Float's first line of defense against the invaders.
  • The Empire: The Batlantis/Vatlantis Empire, better known as the invaders from another universe. Aldea implies that their empire spans half of the world in their dimension.
  • Enemy Mine: This series certainly loves this trope. To make it short, let's just say that by volume 8, every single faction introduced in the previous 7 volumes is fighting on the same side.
  • Enhanced on DVD: The Blu-Ray and DVD release fixed many animation errors and Off-Model shots.
  • Evolving Credits: As new characters are introduced, the opening changes to include them.
  • Excuse Plot: Downplayed. The series does have a legitimate plot separated from all the Not-Quite-Sex scenes, but it's undeniable that many plot points in the series exist entirely to justify the usage of Deus Sex Machina.
  • Foreshadowing: During the anime-only School Festival episode, Hayuru, Yurishia and Silvia present themselves as "school idols for a day", foreshadowing they becoming an actual Idol Singer group in the later volumes of the novel… in the Batlantis Empire.
  • Homosexual Reproduction: The One-Gender Race from the AU reproduce by offering the blood of two women to the Genesis pillar, which then creates a child. This process only gives birth to females.
  • Hope Spot: A rather cruel one in volume 7. The war is over, both worlds were saved, and the main cast managed to befriend their enemies without having to kill anyone. Then the Big Bad Ensemble show up and promptly turn the happy ending into a "Shaggy Dog" Story by destroying both worlds anyway. Thankfully the story didn't end there and the heroes could keep fighting.
  • Hot Springs Episode: The Special Short Story of Volume 9, as well as the third chapter of Volume 11.
  • Human All Along: The invaders from the AU are actually humans that live in another dimension. Granted, this is revealed much earlier than usual for this trope. It was already hinted at the end of the first volume and confirmed midway through the second.
  • Idol Singer: Hayuru, Yurishia and Silvia become an idol group… after being made prisoners by the Batlantis Empire! Sure, the empire wanted to sell the group as "goodwill ambassadors" of Lemuria, but that's still very much Refuge in Audacity.
  • The Immodest Orgasm: This usually happens to Aine, Hayuru or Yurishia after a successful Heart Hybrid or Climax Hybrid.
  • In Medias Res: The series begins with Amaterasu in the middle of a big battle before going back to the beginning of the plot. Turns out that the battle scene was actually the climax of volume 4/Episode 11.
  • Life Energy: Implied to be what powers the Heart Hybrid Gears. The Batlantis/Vatlantis Empire also drains life energy from the remaining human populations within occupied zones such as Tokyo.
  • Magic Kiss: Eros’s second power, nicknamed Kischarge Hybrid. Unlike Heart Hybrid, which restores Hybrid Count, it forcefully releases the remaining Hybrid Count all at once. This allows Kizuna and the girl he kissed to briefly raise the specs of their Heart Hybrid Gear to insane levels. However, if the Hybrid Count reaches zero before they defeat their enemy they will die anyway, making this a Death-or-Glory Attack
  • Magitek: The Heart Hybrid Gear technology, which also doubles as Powered Armor. It's implied to run on the user's Life Energy (a.k.a. Hybrid Count). When it reaches dangerously low levels, the armor disappears. And for the "-ros" series, once the Hybrid Count reaches zero, the user dies. So far, only Kizuna has the ability to replenish the Hybrid Count of his Battle Harem... by doing indecent acts with them or in the anime, through The Power of Love.
    • The weapons used by the invaders from another universe are also this, and the term itself is used by the English sub for the anime.
  • Mecha-Mooks: Most of the magitech weaponry fielded by the invaders are this.
  • Mundane Utility: For a given value of "mundane". The simulation technology used in the "Love Room" was originally developed for combat training, but instead it was used to simulate romantic scenarios to help in the Heart Hybrid sessions.
  • Next Tier Power-Up: After becoming a Physical God, Nayuta obtained the power to safely remove the Core of a Hybrid Gear without killing it's holder, as well as the power to remove the limiter of the Core before having Kizuna reinstall it on the holder. Every character that goes through this process obtains a huge Power-Up.
  • Nipple and Dimed: The light novel illustrations never show the nipples of the girls. The anime, however, does show them in the uncensored TV broadcast and the Blu-ray/DVD version.
  • Not Even Bothering with the Accent: As of volume 3, there are eight Americans and one British girl living in Mega Float Japan, and they all speak flawless Japanese.
  • One-Gender Race: The human race that lives in the AU is composed entirely by women, who are able to perform Homosexual Reproduction. At the end of volume 7, Reiri theorizes that because the people from Atlantis valued magic power above everything else, they prioritized the method of reproduction that created females only, since males have less magic power. This led to the extinction of men in that world.
  • Powered Armor: Again, the Hybrid Gears.
  • Power Limiter: Turns out that the HHG all come with it. The Deus Ex Machina intentionally made them that way so they won't become a threat to themselves. Unfortunately for them, when Nayuta obtained part of their power, she learned how to remove those limiters.
  • The Power of Love: Partly involved in the Deus Sex Machina. Taken to its ultimate conclusion towards the end of the anime adaptation, when Kizuna draws on the power of his companions through sheer love and affection for each other, allowing him to go all-out against Zelshione and beat her down.
  • Public Domain Soundtrack: The Nocturne in E-flat major by Fryderyk Chopin is heard at various points in the anime.
  • Rousseau Was Right: Due to the series running on White-and-Grey Morality. The antagonists from the first story arc are Well-Intentioned Extremist who just want to protect their world while the villains from the following arc all have a Freudian Excuse to explain why they behave the way they do. The only antagonist who doesn't fit either group is Nayuta, and even she Took a Level in Kindness later on.
  • Running Gag: Characters born in Atlantis being surprised by "the strange thing" Kizuna has between his legs.
  • Sequel Hook: The finale of the anime adaptation ends on a cliffhanger. According to Masamune Kuji, a second season of the anime is possible, depending on how the DVD and Blu-Ray sales would turn out.
  • Serial Escalation: The series usage of Deus Sex Machina. How big will be the next crisis Kizuna will solve by getting intimate with the girls in his harem? And just how far can they go while still keeping their status as Technical Virgin? In the last volume, the Technical Virgin aspect of the series is finally thrown out the window and the girls have all-out sex with Kizuna.
  • Sexy Discretion Shot: Downplayed, since actual sex wasn't involved, but the process required for Kizuna to install a Heart Hybrid Gear's Core comes pretty close to it in the light novel. In the anime adaptation however, the scene where he installs Sylvia's core cuts to the outside of the laboratory right when they are about to start, and when it goes back to them it's already over.
    • Subverted in a Meta sense. The scene is fully show as a Special in the 5th Blu-ray.
  • "Shaggy Dog" Story: Barely subverted. The war between the AU/Batlantis Empire and Earth/Lemuria started because Genesis, the pillar that creates life in the AU, was crumbling down, and thus they decided to steal magic power from another world and use it to try to fix the pillar. While the main cast were initially angry to discover that the invaders were using them as cattle, discovering that they were just trying to save their world, and that both worlds could be destroyed if Genesis collapsed, made them decide to fight to save everyone. After lots of battles, they succeeded in fixing Genesis and creating peace for both worlds… only for the Gods that created the worlds in first place to show up, decide that their experiment was a failure, and cut Genesis in half, triggering the end of the worlds anyway. Thankfully, Nayuta was able to save the cast with her new God-like powers and gave them a chance to strike back. The plot didn't end in volume 7, but it would certainly qualify as a Cruel Twist Ending if it did.
  • Situational Sexuality: The humans that live in the AU are all women, so any characters that lives there is a lesbian "by default". At least until Kizuna arrives and changes the situation…
  • Stripperific: The pilot suits that the main cast uses. As a case of In-Universe Values Dissonance, the clothes that the people from the Batlantis Empire casually wear are not what most people from "Lemuria" would consider appropriate for a stroll in the city.
  • Super Mode: Aine, Hayuru and Yurishia can access a so-called "Immoral Weapon" by getting their Hybrid Count above full. And the only way to do that is for Kizuna and any of the girls to perform a more intense version of Heart Hybrid, that is, Climax Hybrid. This procedure also powers up Eros, making it more useful in combat.
  • Super Multi-Purpose Room: What the "Love Room" amounts to. It is capable of recreating any situation or scenario, ranging from battle simulations to dating spots and hotels and can even change what people are wearing. Its main purpose is to ensure things go smoothly between Kizuna and the girls.
  • Technical Virgin: Kizuna and his Battle Harem. They engage in several different sexual acts during the course of the series, but they never have penetrative sex. Finally subverted in the last volume, where they resort to actual sex.
  • Their First Time: When the time finally comes to cross the line, Kizuna chooses Aine to be his first partner. While not without some awkward moments, their first time is portrayed as the most romantic thing to happen to them.
  • Theme Naming: The "-ros" series of Heart Hybrid Gears. (Aine's Zeros, Hayuru's Neros, Yurishia's Cross/Kuros, and Kizuna's Eros.)
  • Transformation Sequence: The main cast gets those in the anime adaptation. Each character only gets to show it once though.
  • Translation Convention: Silvia, Yurishia and the other Masters may have learnt Japanese before coming to Ataraxia, but there is no reason for them to still be speaking that language when they are speaking among themselves. The most obvious example would be the footage of one of Masters' missions back when they were still in America that Kizuna found. The dialogue is still presented in Japanese, even though they are obviously speaking English.
  • 12-Episode Anime: The anime adaptation, adapting the first 4 volumes of the novels.
  • Unspoken Plan Guarantee: Kizuna has an idea to defeat Aine in volume 6, but the reader isn't informed about it until he has a talk with her before the fight starts. And then it turns out that plan was a bluff meant to mislead her, leaving her unprepared for Kizuna's real plan. Naturally, it works like a clock.
  • Uterine Replicator: That's the only means of reproduction in Atlantis, as detailed under Homosexual Reproduction.
  • Vision Quest:
    • In the light novel and the anime adaptation, each of the Heart Gears has to increase their bond with Kizuna during Climax Hybrid sessions. The "Love Room" is designed to expedite the process by projecting holographic clothing and scenery based on each girl's inner kink to increase their sexual arousal, since Climax Hybrid can only be achieved when they accept themselves for who they are.
    • When Yurishia first enters the Love Room, it changed to an S&M style play room and changed her attire to black latex bondage wear. Though initially surprised by the sudden change, Yurishia quickly adapts to it and licks her lips in anticipation. The light novel reveals it's because Yurishia is secretly a masochist and a sexual submissive, who only acts as a Proper Lady in public because it's what's expected of her. By volume 10, she's fully accepted herself for who she is and begins wearing a dog collar in public, so everyone will know she belongs to Kizuna.
  • Wham Line:
    • The last line of Volume 4:
      Zelshione: "Vatlantis Empire’s imperial princess, your highness Ainess Synclavia. I offer you my utmost welcoming."
    • And another one at the end of Volume 6:
      Nayuta: "I became a god."
  • White-and-Grey Morality: Kizuna Hida comes to acknowledge this trope after learning that his foes weren't as bad as he thought, resulting with him becoming an All-Loving Hero. The conflict between Earth/Lemuria and the AU/Batlantis Empire is this. The people from Batlantis invaded because Genesis, the pillar that supports the heaven and earth in their world, is crumbling down and they need to steal lots of magic power to stop this and prevent the end of the world. Unfortunately, with few exceptions, they don't really care what happens to the world they are invading or the people that live in it. On the other hand the people from "Lemuria" just want to defend their world and rescue those that were left behind when they were invaded. At first they aren't even aware that they are fighting against other humans.
  • World of Action Girls: Naturally, being a Battle Harem series where the Chick Magnet hero is the only named male character.
  • World of Buxom: With the notable exception of Sylvia.

Alternative Title(s): Masou Gakuen HXH, Hybrid X Heart Magias Academy Ataraxia