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Manga / Onideka

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Note: Heroine's Size Subject to Change

Onideka is a manga by Yatera Keita that started publishing in December 2015.

Kiryuin Hanao is the idol of her school and her childhood friend Takezo is always by her side, helping her throughout her school activities. But when she suddenly becomes a giantess, she is forced to return to her old ways in order to protect her city and friends. However, it soon becomes apparent that Kiryuin is not the only girl to be afflicted with a sudden change in stature...


Onideka provides examples of:

  • Adults Are Useless: Japan, and eventually the world, is quick to declare Kiryuin a hero and have her defeat the giantesses created by the Chaos. Takezo even calls a couple of soldiers out on this considering that they are trained adults whereas Kiryuin is a high school girl. A giant one but a high school girl nonetheless.
  • Animate Dead: Cosmes admits that without at least a portion of itself inside of him, Takezo will die. As an added bonus though, Takezo now has Nigh-Invulnerability, which saves his neck more than once.
  • Arc Words: "Heart throbs will save the world." Also, "Cute is justice."
  • Attack Of The 50 Ft Whatever: This manga in a nutshell with a giantess for every female trope. By Chapter 22 note  there’s at least one giantess in every major country for every walk of life with some demonstrating random powers alongside the crowd control power all of them, even Kiryuin, share.
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  • Attention Whore: All of the Chaos empowered giantesses are this to varying degrees. Kanae gets a suspiciously heavy blush when she notices the crowds of people watching her.
  • Behemoth Battle: Par for the course but on a continually escalating scale. With every major conflict Kiryuin has with another giantess, her size, and the amount of destruction that is wrought, grows by whole leaps and bounds. note 
  • Berserk Button: Quite a few of the giantesses have this with a few, like Kanae and Hatora, even growing larger as a result of it being pressed.
  • Big Eater: Given she’s 60 meters tall and hadn’t eaten since lunch earlier that day, it’s rather understandable that a whole open air bathtub is needed to make enough curry for her to eat.
  • Bland-Name Product: WcDonald's appears once again for all our fast food non-corporate sponsored needs. Subverted when websites like Twitter and YouTube get namedropped. Not to mention peace activist “Oko Yono…”
  • Brought Down to Normal: The giantesses turn back to normal after being defeated.
    • Happens to Kiryuin during her fight with Sumomo when the latter drops Takezo, briefly killing him. This cuts the psychic connection between Kiryuin and Cosmes, causing her to shrink back to her normal height. It's only when Cosmes imparts part of itself into Kiryuin that she is able to grow again.
  • Calling Your Attacks: Kiryuin has a habit of doing this when dealing out the final blow to her opponents with her signature Kiryuin Kick. The Tiger Twins also do this for most of their attacks.
  • Cannot Spit It Out: Neither Kiryuin nor Takezo can manage to outright say their feelings for one another though it is plainly obvious to anyone who meets them. To be fair, even the not-quite-confessions gets Kiryuin growing by several meters at least. Who knows how big she’d get if Takezo actually manages to confess.
  • Car Fu: More like car-toss but in Kiryuin’s defense, cars were rather heavy for her at her then current size of 20 meters and she did manage to get Kanae’s nose to bleed with one though that had mixed results.
  • Caught with Your Pants Down: Takezo is caught masturbating to Kiryuin by his little sister.
  • Childhood Friend Romance: Takezo and Kiryuin though both of them Cannot Spit It Out.
  • Comedic Underwear Exposure: Inverted. Turns out that Sumomo, the Osaka giantess, was wearing something else beneath her tracksuit.
  • Comical Overreacting: Kotora tends to be very surprised by all of the mayhem her younger twin Hatora is wanting to start, often boggling out at her straight-faced declarations of revolution.
  • Corrupt Politician: Shibeita the governor of Osaka who declared its independence from Japan and war on Tokyo turns out to be Sumomo’s brother.
  • Crouching Moron, Hidden Badass: Sumomo, despite being a rather poor comedian, proves to be a rather adept fighter. She is also the only giantess that manages to cause Kiryuin to shrink back to her original size via absorbing a part of Cosmes.
  • Defeat Equals Explosion: All the giantesses that Kiryuin defeats explode in a massive cloud of smoke before reappearing at their normal size.
  • Disproportionate Retribution: The President of the United States launches a nuclear missile at Kiryuin for making the American giantess Hanna cry.
  • Driven by Envy: Kanae feels this especially with Kiryuin whom she describes as having an easy life due to being naturally cute whereas Kanae has had to work for it. The Chaos inside her chants “Envy, Jealousy, Begrudge!” upon her defeat and its destruction.
  • Eagleland: Mixed Flavor. Upon being asked what to do about the captured Kiryuin, the Prime Minister of Japan’s first action is to call the President of America and ask them. Of course, this is when we learn that there are multiple places where the Chaos have landed across the world.
  • Earpiece Conversation: With her being over 120 meters at the beginning of her trip to the peace conference in Shanghai, this is how Kiryuin is able to communicate with Dr. Senba down at her feet.
  • Enigmatic Empowering Entity: Cosmes and the Chaos. Aside from seeing what the Chaos have wrought on other worlds before, Cosmes has never fully explained why it or its darker colored brethren hope to achieve by turning seemingly random girls into giantesses. The final chapter reveals that they have been testing humanity for their emotions, which is what the Chaos live on; they chose to take control of young girls because they're the most emotional.
  • Extremely Short Timespan: Chapters 1 through 14 of the manga take place in a span of only three days at best. In that time Kiryuin grows from being a normal sized teenage girl to a towering 120 meters. She also meets, fights, and defeats three different Chaos empowered giantesses of varying size.
  • Giant Woman: The premise of the whole series is based around girls around the world becoming gigantic.
  • Giftedly Bad: Though some jokes may be lost in translation, Sumomo’s attempts at comedy leave a lot to be desired.
  • Goal in Life: As it turns out, Kiryuin’s is to become a bride to a certain someone. The Chaos empowered giantesses each had one but it was the failure of achieving that goal and the emotions tied to those broken dreams that drew the Chaos to them.
  • God Guise: The giantesses empowered by the Chaos refer to them as gods or the divine though Cosmes never refers to itself or its darker brethren as such.
  • Good Old Fisticuffs: For all that they are composed of (mostly) normal girls and women, a lot of the giantesses have shown to be rather adept hand-to-hand fighters.
  • Gonk: Chikami, the schoolyard bully, is drawn this way.
  • Green-Eyed Monster: Kanae is this whenever Kiryuin is mentioned, specifically Kiryuin’s cuteness or when she takes away attention from herself.
  • Heart Is an Awesome Power: According to Cosmes, this is the root of Kiryuin and all of the other giantesses, size and power though each has a specific emotional tie such as love, envy/admiration, laughter, etc.
    Cosmes: Heartthrobs will save the world. The more your heart throbs, the bigger and stronger you become.
  • Height Angst: Kiryuin is at first not happy about becoming a giant, and part of her impetus to fight is that by defeating the other giantesses, she might turn back to her original size.
  • Human Weapon: Kiryuin and Sumomo are this. Kiryuin in defense of the Earth is all but conscripted to go and fight any giantess that appears whereas Sumomo was used by the governor of Osaka as a weapon against Tokyo in his bid of making Osaka independent from the rest of Japan.
  • I Just Want to Be Normal: Kiryuin’s reasoning behind her taking up the job of being a hero of Earth and defeating the Chaos and the giantesses infected by them. All so that she can return to her normal size and be with Takezo.
  • Improvised Weapon: All of the giantesses end up doing this at least once in their fights. Kiryuin using cars as throwing weapons, Kanae using a bullet train for a nunchuk, etc.
  • Intrepid Reporter: Kawarada and his cameraman partner Ohashi who are the first to realize that the giantesses, including Kiryuin, possess More Than Mind Control.
  • Invulnerable Civilians: Subverted. Right from the start it’s shown that even a giantessnote  merely walking and not actively destroying anything leads to a running death toll. Kiryuin even makes it a point to try and keep her fights in open areas away from crowds.
  • Just Following Orders: A soldier states this trope outright as an apology to Kiryuin whom the Self-Defense Force had captured and tied up earlier.
  • "Just Joking" Justification: This is Sumomo’s reasoning for most of her actions. Considering her ideal is “Laughter is Power,” that might be a bit of an understatement.
  • Magic Pants: The giantesses' clothing grow along with them.
  • Mass Empowering Event: The arrival of the Chaos, including Cosmes, which causes young women around the world to become giants.
  • Meido: Kanae, the second giantess to appear, is this and became popular enough among fans to appear in the live action commercial for the release of the second volume.
  • Moe: Invoked by a majority of people when describing Kiryuin and several other giantesses. For some giantesses, it is also a piece of their “ideal” and can help them sway crowds of people to their sympathize/idolize them via More Than Mind Control.
  • Mood-Swinger: Kanae tends to go back and forth between being a proper Meido and a Green-Eyed Monster with certain triggers. Namely whenever people are paying more attention to Kiryuin than her.
  • More Than Meets the Eye: A dialogue between Cosmes and a Chaos reveals that Cosmes specifically chose to inhabit Takezo’s body for a reason though what it is remains to be revealed though it and the Chaos both refer to him as being an “Irregular.”
  • More Than Mind Control: All of the giantesses have this ability to “win over” whole crowds of people to their ideals for the world and can be empowered by them in turn in some cases, notably Kiryuin. Fortunately the degree of effect seems to vary by the scale of the giantess and the “openness” of people’s hearts to the ideal of the giantess in question.
  • Mud Wrestling: Well, more like curry wrestling but it doesn’t stop most viewers of the fight from seeing something else rather than a fight with Japan’s fate on the line.
  • Non-Answer: Cosmes does not outright say whether or not Kiryuin or Takezo will be returned to normal upon defeating the Chaos running rampant across the world.
  • Nosebleed: Kiryuin’s nose tends to bleed whenever she gets a sufficiently powerful blow to the face but also heals fairly quickly too.
  • Not a Game: A few students think that Kiryuin turning into a giant, the slow but steady approach of a kaiju, and the news chopper flying overhead are part of some superhero show until one student points out that they are running a flash news. With a running death toll.
  • Old Master: Abandoned by their parents due to the one-child per family law, the Tiger Sisters were found, raised, and trained by an Old Sage deep in the mountains of China.
  • Omniglot: Thanks to the piece of Cosmes inside of her, Kiryuin can understand the language of any foreign giantess and they can understand her in kind. Inverted in that it only applies to Chaos empowered giantesses and not normal people.
  • Our Giants Are Bigger: Every new giantess that appears is far larger than the last with Kanae, the Maid Giantess, being a little over 50 metersnote  while Hannah, the Cheerleader Captain Giantess, is somewhere close to 530 metersnote .
  • Panty Shot: Inverted. Contrary to most manga, particularly one featuring a giant high school girl, there’s a lot of convenient censoring to be had. That and Kiryuin put her foot down on the blatantly perverted antics right from the start.
    Kiryuin: Listen up… If you come within ten meters of me… I’ll step on you!
  • The Reveal: Sumomo drops a heck of a reveal. Namely that her piece of Chaos started out white and that its name was Cosmes too.
  • Right for the Wrong Reasons: Kiryuin fights the other giantesses, and the Chaos empowering them, because she believes that if she doesn’t she will never return to her normal size and that Takezo will die.
  • Scenery Censor: A lot of low-angle panels looking up at giantesses wearing skirts or dresses have a lot of building block certain sights from view.
  • She Is Not My Girlfriend: Both Kiryuin and Takezo deny that they are anything but good friends, though it becomes apparent that they have feelings for each other.
  • School Idol: Kiryuin is labeled as such several times throughout most of the introductory chapters by Takezo who doesn’t quite see why until he confesses to himself that she is kind of cute.
  • Shoo the Dog: Because Takezo's presence makes her grow and cause more damage, Kiryuin tells him that she hates him so that he'll leave.
  • Shout-Out: Far, far too many to name.
    • The overall concept of a giant fighting other giants to save the world is an obvious nod to Ultraman and similar Tokusatsu shows. Kiryuin is compared to Ultraman at one point, and an Ultraman doll is seen in one panel.
    • While fighting the Tiger Twins, Kiryuin says "What is this, Kung Fu Panda?"
    • Upon arriving at New York, Kiryuin picks up King Kong, who is palm sized to her.
    • Among the crowd chasing Takezo in the final chapters are two go-kart drivers dressed as Mario and Luigi.
  • Sizeshifter: While Kiryuin has undergone the most dramatic changes in scale, having grown from her initial spurt of 20 metersnote  to 360 metersnote , particularly when her heart “throbs” for Takezu. Hatora also doubled in size from 120 meters to 240 meters after absorbing the Black Cosmes of her twin sister Kotora.
  • So Unfunny, It's Funny: With a dash of More Than Mind Control, Sumomo tends to get her audience to laugh themselves sick regardless of her actions, including one poor guy losing his shop from her stepping on it.
  • Splash Panel: The manga is filled with them. Each chapter has on average four splash pages showcasing the scale of the giantess to the environment surrounding them, including some spectacularly detailed cityscapes.
  • Sufficiently Advanced Alien: Cosmes and the legions of Chaosnote  whose motives are yet currently unexplained only that Cosmes itself seems to want to stop the spreading of chaos from its fellow aliens and that they all are emotionally empowered.
  • Suspiciously Specific Denial: By Kiryuin to Takezo mere moments after being told by Cosmes that she will grow in size and power every time Takezo or Cosmes using him as a Meat Puppet causes her “heart to throb”.
    Kiryuin: It’s not like I became big because of you, okay?!
  • Taken for Granite: Stopping the nuclear missile by asorbing its energy turns Kiryuin into a statue. Takezo brings her back to life by confessing his love for her.
  • Telepathic Spacemen: Cosmes and the Chaos communicate telepathically and are noted to be loud and echo inside people’s heads the closer they are to them. The Chaos are also known to speak in multiple voices at once to Cosmes’ singular voice.
  • Tiny Guy, Huge Girl: When they were kids, Takezo was actually shorter than Kiryuin. Now that she’s grown into a giantess, this might be a bit too literal…
  • Tragic Dream: What the Chaos specifically looks for in their hosts before turning them into giantesses and having said host embrace the ideal of their broken dreams.
  • Troubled Backstory Flashback: Every Chaos empowered giantess has received one so far, though some with more details than others, which reveal they all have had a truly Tragic Dream.
  • Wardrobe Malfunction: See Comedic Underwear Exposure.
  • Wham Line: "And that Black Cosmes. Mine Started out white too."

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