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Manga / The Red Ranger Becomes an Adventurer in Another World

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Our story begins with our hero, the Kizuna Red Ranger Tougo Asagaki, battling the nefarious Ender King. The odds are stacked against him and he knows he won't make it out alive, but he takes solace in knowing that the friends and world he loves so much are safe. But as his life flashes before his eyes, he's knocked out of his stupor when he falls on his head in the middle of an ancient ruin. Lost in this fantasy world with no one else in sight, Red searches for a way home, using his powers to become an adventurer who defends the innocent!

Six months later, a down-on-her-luck wizard named Idola Avorn doesn't have the money she needs to hire an A-rank adventurer to help her in her research. After countless B-rank adventurers try and fail to overcome her test, who else barges in but the Kizuna Red Ranger himself, who proceeds to make a mess of Idola's property with his inexplicable ability to make things explode without magic.


And so the paths of the Red Ranger and grand wizard girl intertwine in this exciting story straight out of a Sunday morning cartoon!

So say it with us now, BANSOU-CHANGE!

The Red Ranger Becomes an Adventurer In Another World (Sentai Red ga Isekai de Boukensha ni Naru) is a manga written by Koyoshi Nakayoshi and serialized in Monthly Shonen Gangan in the fall of 2020.

The Red Ranger Becomes an Adventurer In Another World contains examples of:

  • Affectionate Parody: Of stock Toku heroes. Red plays all of the sentai tropes incredibly straight, but they don't always mesh well in a fantasy setting. For instance, summoning your Humongous Mecha in a tiny cave means that it simply can't move inside such a cramped space.
  • Anti-Climax: After defeating the Ender King, Red is dying and reminisces on the good times he had with his friends while hoping that the world is saved... then he hits his head and sits up injury-free in another world.
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  • Artifact of Doom: The seemingly parasitic Seeds of Magic, which embed themselves into a user in exchange for powerful magic, only to eventually transform the user into a gruesome monster. Teltina believes that Shauha is behind them and is working to rid the world of them.
  • Back-to-Back Badasses: Double Subverted. When pitted against a monster who can always appear in someone's blind spots, Teltina proposes fighting with Rosie behind him. Idola quickly points out all the problems with this, namely that Rosie is completely unwilling and unable to cooperate with Red along with the fact that anyone behind Red would get scorched by the explosion of his Transformation Sequence. It takes an off-screen Training Montage and Teltina bribing Rosie with a Lap Pillow to get it to work out.
  • Badass Crew: The Kizuna Five are a bunch of Super Sentai expies who battled the Enders. They fought off entire armies worth of foes where the Mooks are as tough as high-level monsters in Idola's world. They also have a BFG and a Humongous Mecha that run on The Power of Friendship.
  • Bathtub Bonding: Idola and Teltina spend a scene bathing in a natural hot spring outside Akarina. During this time, Idola asks why Teltina sought her out, with the latter revealing that she's been reading Idola's reports and has admired her tireless efforts to improve people's lives with magic.
  • Better Than a Bare Bulb: Due to having no frame of reference for the absurdities of Sentai series, the other characters, especially Idola, frequently complain about Red's obnoxiously flashy weapons, absurd powers that make no sense, and brightly colored spandex that just looks weird in the fantasy setting the story takes place in. Red is, for the most part, either oblivious to or somewhat confused by these complaints due to a severe case of Culture Clash. All of it Played for Laughs, of course.
  • Brick Joke: At the beginning of the second chapter, the guild manager tells Red and Idola to do whatever they're doing at home after Idola ends up straddling him in public. At the end of the chapter, Red transforms to get away from her needle, prompting the same response from the guild manager.
  • Colony Drop: When Lurguat is defeated, the Seed of Magic in his body goes berserk, turning him into a spherical mass of flesh large enough to flatten a city as large as Akarina. It takes the Maximum Kizuna Kaiser pushing it into space to avert this disaster.
  • Color-Coded for Your Convenience: The Kizuna Five have hair or outfit colors that match their color. Red, for instance, has blazing red hair and eyes.
  • Common Tongue: Despite arriving in an entirely different world than his own, Red has no problems with communication and quickly becomes a B-Rank adventurer in six months.
  • Cool vs. Awesome: Irritated by Red's overly friendly impertinence and lack of decorum towards Princess Teltina (as well as his animosity towards anything that can interrupt his alone time with Teltina), Rosie challenges Red to a duel for the right to travel with her and aid her on her quest to destroy the Seeds of Magic, a challenge Red takes him up on. And so begins a fight between a Hot-Blooded Toku hero and a classic Japanese RPG hero with their best gear in a continually escalating fight that ends with Red sending Rosie flying with the wind from the Great Kizuna Sword.
  • Culture Clash:
    • Red's Hot-Blooded sensibilities, Henshin Hero powers, and Humongous Mecha are out of place in the fantasy world Idola lives in, and anyone who sees him is either dumbstruck or mesmerized by what they're watching. His casualness also clashes with the stuffy class hierarchies of commoners and nobles, pissing off Princess Teltina's Crazy Jealous Guy bodyguard when Red fails to show Teltina proper respect.
    • On a more humorous note, Red's sentai uniform is a hit with kids in his world, who all gush about how cool it and by extension Red is. In Idola's world, it's considered weird and tacky, to the point that Idola can hardly believe that any kid would like it if they weren't brainwashed. Rosie also taunts Red for this during their duel, sarcastically asking if Red is a clown when he sees it.
  • Dragon Hoard: While exploring the Ruins of Wakenark in search of mana-metal, Red and Idola find it piled in a heap at the end of a cave. This comes across as odd to Idola, as it normally spouts from the earth like a frozen fountain. She realizes why this is the case when an ancient dragon tries to swat both her and Red, revealing the mound to be its hoard.
  • Dual Wielding: Kizuna Blue is seen wielding twin swords in a reverse grip in the brief handful of panels he's on-screen. Kizuna Yellow is also seen wielding twin sickles connected by a chain.
  • Ear Cleaning: To get Rosie to cooperate with Red and fight as Back-to-Back Badasses, Teltina promises to give Rosie a lap pillow along with an ear cleaning. Rosie quickly agrees.
  • Exactly What It Says on the Tin: The story is exactly what it sounds like: an isekai about a Hot-Blooded Red Ranger who ends up trapped in a fantasy world after the final climactic battle with the Rangers' enemies, and uses his Ranger powers to become an adventurer while he looks for a way home - much to the confusion of the otherworld's residents, who have absolutely no context for sentai heroes or their powers.
  • Fantastic Racism: Magical power is everything when it comes your status as an adventurer, wizard, or noble, and being an Un-Sorcerer is enough a reason to be ostracized and have rocks thrown at you. While Red sidesteps this due to his seemingly magical Henshin Hero powers, Rosie isn't so lucky and spent his entire life up to meeting Teltina living in bitter loneliness and squalor despite his prowess as a Badass Normal.
  • Five-Man Band: Red's flashbacks present this dynamic among the Kizuna Five:
    • The Hero: Red is the Hot-Blooded leader and the one who gives his life to take down the Ender King.
    • The Lancer: Kizuna Blue seems to be Red's Best Friend and their colors are diametrically opposed.
    • The Big Guy: Kizuna Green isn't seen using the weapons of his teammates, instead holding up two Mooks in a Neck Lift. Suitably enough, he's bigger and more muscular than any of his teammates.
    • The Smart Guy: Kizuna Yellow is seen lecturing Red about his study habits.
    • The Chick: Kizuna Pink shares a tender moment with Red while hanging up what appear to be good luck notes for a festival like Tanebata.
    • Sixth Ranger: In addition to the Kizuna Five, there is also a Kizuna Silver, nicknamed "Sil". According to Red, she is so observant that she could say things you'd never admit as if seeing right through you.
  • Furo Scene: There's a scene where Idola and Teltina bathe together in a natural hot spring outside Akarina. In addition to the Fanservice of seeing the girls naked (with Censor Steam covering the naughty bits), the two are able to relax and talk to each other about why Teltina sought Idola out and their mutual respect for one another.
  • Gender-Equal Ensemble: The protagonists' party consists of two guys (Red and Rosie) and two girls (Idola and Teltina), as Red and Idola had already been working together before meeting up with Teltina and Rosie, who acts as Teltina's bodyguard.
  • Generic Doomsday Villain: The Ender King has no known motive aside from wanting to conquer Earth and wipe out the human race, which motivates the Kizuna Five to stop him.
  • Hero of Another Story: Red's backstory is this. He and his friends had a huge, expansive adventure that was just finished when he arrived in this new world.
  • Instant Runes: A sigil lights up on Red's back when he transforms, creating the explosion that blasts away everything behind him. It appears again when he dispels his costume, sucking everything back in.
  • Lap Pillow: Teltina bribes Rosie with an offer of this combined with an Ear Cleaning to get him to cooperate with Red to save Akarina.
  • Like Reality Unless Noted: Idola's world shares a remarkable number of concepts with the modern world Red is familiar with. Time is tracked in hours and days and Red has no real problems communicating with anyone aside from Culture Clash. He also notices that many problems he's seen or heard about in his world, like slavery, are widespread in Idola's world, so he makes it his mission to correct injustice wherever he goes just as he did back home. Lap Pillows and Ear Cleanings also have the same intimacy in Idola's world that they do in Japan.
    • Similarly, Red's world appears to be similar to our own world, with cities, technologies, and fashions that wouldn't appear strange in our world showing up (the Sentai-esque tech notwithstanding).
  • Male Gaze: A lot of the panels call attention to Idola's breasts or butt, and the two adventurers she kicked out of her house are quick to leer at her boobs after making a bet against her.
  • Maou the Demon King: Idola mentions that the demon lord of ages past was sealed away by a hero from another world. Rosie wields the sword that did the sealing, contributing to his credentials as a hero.
    • At the end of the fifth chapter, an unknown villain claims that their goal is to revive Maou-sama.
  • Murder the Hypotenuse: Seeing Red as a threat to his affections for Teltina, Rosie steals Red's Bansou Plate in the middle of the night so Red can't transform while fighting the monster empowered by the Seed of Magic.
  • Normal Fish in a Tiny Pond: Red claims that some of the stronger enemies that he Idola face are as strong as some of the weaker members of the Enders. In addition, he's able to summon technologies and weapons capable of obliterating the strongest foes with barely any effort.
  • "Not Making This Up" Disclaimer: The fan translator leaves a side note that they're not making up the names of Red's weapons or attacks, including (but not limited to) the Handshake-Calibur, the Marriage Beam Gun, Matchmaker's Snipe, Marriage Shot, and Engagement Burst.
  • Not What It Looks Like:
    • Red squirms when Idola tries to take some of his blood to figure out the source of his powers. The ensuing struggle ends with her on top of him, prompting the manager of the adventurer's guild to ask them to do such things somewhere else.
    • It happens again when Poseidon tries to castrate Red out of fear that the latter will make advances on Idola. This time, the princess shows up, cheerfully noting that these two are "enthusiastic" in the morning.
    • In Red and Misty's duel, Red calls on the Maximum Kizuna Kaiser to match Misty's sacred sword. Princess Teltina accidentally gets swept into the cockpit in the process, and Misty immediately accuses Red of taking her hostage.
  • OOC Is Serious Business: In chapter 2, when the Seed-infested man first shows up in monster form, all the minotaurs that the group had been fighting run away in fear, and Red steps forward without his usual Hot-Blooded attitude, claiming it feels like one of the Secret Society he fought against.
  • Our Wyverns Are Different: Idola owns a wyvern that she uses for transportation. It's apparently domesticated and snuggles up to her affectionately while gently eating a whole cooked chicken off a stick.
  • Reality Ensues: Red still has all his powers as the Red Ranger. Unfortunately, The Power of Friendship doesn't work as well without his friends backing him up, and he often uses them at inopportune times due to not being used to the fantasy world he's in.
    • Whenever Red transforms into Kizuna Red, there's always an explosion appearing behind his back and he tends to make stuff explode as a Destructive Savior. This makes him as much as a hazard to his allies as his enemies, and no one besides Idola wants to party with him because of his inability to avoid destroying the precious drop items.
    • His Humongous Mecha is incredibly powerful, but it's so huge that it can't be used in an enclosed space. And as a weapon designed for fighting Kaiju, it's too big to properly fight anything remotely human-sized.
    • Red's Hot-Blooded, happy-go-lucky friendliness only makes him weird to the locals, who wonder why he poses so strangely. His lack of decorum quickly draws the ire of the princess' bodyguard, who quickly picks a fight with him over his inability to address her properly.
  • RPG-Mechanics Verse: Idola's world works much like an RPG video game, complete with stat screens and levels. Funnily enough, Red's own stat sheet reads more like a data card off a Toku show, listing information like his height and weight, running speed, and punching power versus typical RPG stats like strength and speed. note 
  • Secret Test of Character: Lampshaded. Red barges into the Avorn estate by tackling the golem Idola was using to test adventurers to see if they would be tough enough to help her. He initially assumes that it was a kidnapper of some kind, but then jumps to the conclusion that it was all one prolonged test of his abilities. Idola sheepishly says that, no, she hadn't been testing him because she didn't know that he'd even arrived yet, and that he'd done all of that on his own.
  • Set Swords to "Stun": Red and Rosie's swords only seem to harm monsters. When used against people, they only seem to knock them out. This becomes especially egregious after Red uses the Maximum Kizuna Kaiser to push Lurguat's mutated body into space, cut it in half, and make it explode with Rosie's help, only for Lurguat to show up merely unconscious on the ground.
  • Shout-Out: Because Red is a Henshin Hero Trapped in Another World, he makes constant references to Tokusatsu and Japanese pop culture in general.
  • "Super Sentai" Stance: Red, Idola, and the two unnamed adventurers they're partying with instinctively strike one of these poses after successfully using the Victory Kizuna Buster to defeat a powerful monster. Idola and the others are wondering why and how long they've been striking this pose when they finally realize they're doing it.
  • Talking Is a Free Action: Subverted and Played for Laughs. Idola is busy protecting the others from Lurguat's monsters with a barrier when Red, Rosie, and Teltina all decide to work out their issues along with dropping an Exposition Dump. Idola becomes increasingly frantic as the barrier cracks and she becomes nauseous from the effort needed to maintain it. Luckily for her, they finish and finally get their act together by the time the barrier collapses completely.
  • Theme Naming: The Kizuna Five's weapons have a tendency to be named after things related to bonds and relationships, including marriage. Hence there's the relatively tame names of Handshake-Calibur and Victory Kizuna Buster, versus the comparatively outlandish (for the genre) Marriage Beam Gun.
    • Likewise, the Enders' names tend to reflect the breaking of bonds, like the original Japanese name for their King, "Isolation King," and one boss is named "Rejection Ender".
  • Trapped in Another World: The story begins with Red being transported to another world after giving his life to take down the Ender King. He wasn't the first one either, as Idola mentions that there are numerous heroes who claimed to be from another world who arrived in times of crisis. At the end of the fifth chapter, an unnamed villain points out that he's not even the first Ranger in their world.
  • Two Girls to a Team: The Kizuna Five had three guys (Red, Green, and Blue) to two girls (Yellow and Pink), though there's a brief glimpse of a feminine-looking Kizuna Silver while Red's life is flashing before his eyes.
    • As of chapter 5, this also holds up to Red's new group, with Idola and the Princess taking the role of two women the team.
  • Uniqueness Decay: At the crux of Rosie's Green-Eyed Monster behavior toward Red is his lack of magical power. The only real qualification to wield the Royal Sacred Sword is the lack of it, and Rosie is terrified of being replaced as the hero and going back to his lonely, miserable existence when Red, another powerful warrior without magic, shows up out of the blue and grows close to Teltina.
    • At the end of chapter 5, an unknown villain remarks that "It's a red one this time" regarding Red, implying that other Sentai rangers have shown up in this world in the past.
  • Wham Episode: Chapter 5: Teltina has a Magic Seed, and we see a mysterious figure holding multiple Magic Seeds make a comment that implies that the villains have fought Sentai Rangers before, and that their ultimate goal is to resurrect Maou-sama, a figure previously mentioned as having been sealed away by Rosie's sword. We also get to see the Sixth Ranger, Silver, in a flashback.
  • Wham Line: At the end of Chapter 5, a mysterious figure remarks that "it's a red one this time" while observing Red from a distance, implying that other Sentai rangers have shown up in Idola's world. On top of that, the rangers are getting hunted for the sake of reviving the Demon Lord.
  • With Catlike Tread: While competing with Red to show him who the better adventurers are, the two unnamed Rank B adventurers try to sneak around to the boss to take it out while Red is busy dealing with the other monsters. Unfortunately for them, Red transforms, causing a deafening explosion that quickly draws every monster in the cave toward them.
  • Wizard Duel: The position of Royal Family Wand can be seized by defeating the current Wand in single magical combat. Idola's father lost the position to Shauha some time before the story.
  • Wounded Hero, Weaker Helper: Although he's normally strong enough to take on almost anything Idola's world can throw at him, Red needs Idola to rescue him after he uses up all of his energy after failed attempts to use the Maximum Kizuna Kaiser and the Victory Kizuna Buster.


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