# I Got a Cheat Skill in Another World and Became Unrivaled in the Real World, Too

I Got a Cheat Skill in Another World and Became Unrivaled in the Real World, Too, shortened to Iseleve (いせれべ, Iserebe), is a Japanese light novel series written by Miku and illustrated by Rein Kuwashima. It began as a web novel that started in the Kakuyomu website in March 2017. It was later acquired by Fujimi Shobo, who have published the series since December 2018 under their Fujimi Fantasia Bunko imprint.
A manga adaptation illustrated by Kazuomi Minatogawa has been serialized on ASCII Media Works' Dengeki PlayStation Comic Web website since December 2019, with its chapters collected into six tankōbon volumes as of July 2024. An anime television series adaptation produced by TMS Entertainment and animated by Millepensee aired from April to June 2023. A new anime project has been announced.

## Plot

Yūya Tenjo is an overweight, short and meek middle school student who is bullied at school and tormented by his family, except for his grandfather who is the only person who cares for him. When his grandfather dies and leaves Yūya as the sole heir of his house, his parents expel him from home, and he is forced to live there alone. Inside his grandfather's house, Yūya discovers a portal to another world named Argena, where he obtains power that will change his life forever as it leads him into battle against multiple powerful malevolent entities, demons, extraterrestials, and even gods, sometimes for the sake of the very fabric of existence itself, in the past, present and future.

## Media
### Light novel

Written by Miku, the series began publication online in the Kakuyomu website on March 25, 2017, under the tentative title Level Up wa Jinsei o Kaeta (レベルアップは人生を変えた, lit. "Level Up Changed My Life"). The series was later acquired by Fujimi Shobo, who began publishing the novels with illustrations by Rein Kuwashima starting on December 20, 2018, under their Fujimi Fantasia Bunko imprint. As of December 2024, seventeen volumes have been released.
In September 2021, Yen Press announced that they had licensed the novels for English publication.
A spin-off series titled I Got a Cheat Skill in Another World and Became Unrivaled in the Real World, Too: Girls Side (異世界でチート能力を手にした俺は、現実世界をも無双する　ガールズサイド ～華麗なる乙女たちの冒険は世界を変えた～), written by Ryō Kotohira and illustrated by Kuwashima, began publication under the Fantasia Bunko imprint on December 20, 2022. As of May 2024, five volumes have been released. Its plot deals with Princess Lexia's impulsive decision to engage in a "learning journey" throughout her world in order to become Yūya's equal, and ends up gathering her own experiences to help her grow into her own.
On February 20, 2025, another spin-off story was released. Titled I Got a Cheat Skill in Another World and Became Unrivaled in the Real World, Too: The Story of Kaori Hōjō ~ The Ignorant Young Lady Saved the World Behind the Scenes (異世界でチート能力を手にした俺は、現実世界をも無双する　宝城佳織伝 ～常識知らずなお嬢様は陰で世界を救っていた～), and also written by Kotohira and illustrated by Kuwashima, its plot details Kaori Hōjō encountering a magical girl named Noah and discovering her own magical power hidden within herself in the course of her adventures with her.

#### Main series

| No. | Original release date | Original ISBN | English release date | English ISBN |
| 1 | December 20, 2018 | 978-4-04-073023-3 | May 17, 2022 | 978-1-97-533393-5 |
| 2 | April 20, 2019 | 978-4-04-073024-0 | April 18, 2023 | 978-1-97-533395-9 |
| 3 | August 20, 2019 | 978-4-04-073304-3 | August 22, 2023 | 978-1-97-533397-3 |
| 4 | December 20, 2019 | 978-4-04-073305-0 | December 12, 2023 | 978-1-97-533399-7 |
| 5 | April 17, 2020 | 978-4-04-073632-7 | June 18, 2024 | 978-1-97-533401-7 |
| 6 | August 20, 2020 | 978-4-04-073633-4 | October 29, 2024 | 978-1-97-533403-1 |
| 7 | December 19, 2020 | 978-4-04-073917-5 | — | — |
| 8 | May 20, 2021 | 978-4-04-073918-2 | — | — |
| 9 | October 20, 2021 | 978-4-04-074248-9 | — | — |
| 10 | March 19, 2022 | 978-4-04-074249-6 | — | — |
| 11 | August 20, 2022 | 978-4-04-074576-3 | — | — |
| 12 | December 20, 2022 | 978-4-04-074577-0 | — | — |
| 13 | March 17, 2023 | 978-4-04-074920-4 | — | — |
| 14 | June 20, 2023 | 978-4-04-075016-3 | — | — |
| 15 | February 20, 2024 | 978-4-04-075300-3 | — | — |
| 16 | July 20, 2024 | 978-4-04-075497-0 | — | — |
| 17 | December 20, 2024 | 978-4-04-075729-2 | — | — |
| 18 | May 22, 2025 | — | — | — |

#### Spin-offs

Girls Side
| No. | Release date | ISBN |
| 1 | December 20, 2022 | 978-4-04-074769-9 |
| 2 | March 17, 2023 | 978-4-04-074921-1 |
| 3 | September 20, 2023 | 978-4-04-075055-2 |
| 4 | January 19, 2024 | 978-4-04-075301-0 |
| 5 | May 17, 2024 | 978-4-04-075449-9 |
The Story of Kaori Hōjō
| No. | Release date | ISBN |
| 1 | February 20, 2025 | 978-40-40-75779-7 |

### Manga

A manga adaptation illustrated by Kazuomi Minatogawa began serialization on ASCII Media Works' Dengeki PlayStation Comic Web website on December 13, 2019. As of July 2024, six tankōbon volumes have been released. Yen Press has also licensed the manga in English.
A manga adaptation of the spin-off series Girls Side, illustrated by Miinosuke Seo, began serialization on the KadoComi and Nico Nico Manga websites on April 25, 2024. As of November 2024, a single tankōbon volume has been released.

#### Main series

| No. | Original release date | Original ISBN | English release date | English ISBN |
| 1 | August 26, 2020 | 978-4-04-913364-6 | May 24, 2022 | 978-1-97-533391-1 |
| 2 | May 27, 2021 | 978-4-04-913819-1 | January 17, 2023 | 978-1-97-534288-3 |
| 3 | March 10, 2022 | 978-4-04-914299-0 | April 18, 2023 | 978-1-97-535275-2 |
| 4 | December 26, 2022 | 978-4-04-914778-0 | December 12, 2023 | 978-1-97-537656-7 |
| 5 | August 25, 2023 | 978-4-04-915225-8 | August 20, 2024 | 978-1-97-539282-6 |
| 6 | July 26, 2024 | 978-4-04-915823-6 | — | — |

#### Spin-off

| No. | Release date | ISBN |
| 1 | November 27, 2024 | 978-4-04-916076-5 |

### Anime

In August 2022, it was announced the novels would be receiving an anime television series adaptation. The series is produced by TMS Entertainment and animated by Millepensee, with Shingo Tanabe directing, Shin Itagaki serving as chief director and supervising the scripts, Hiromi Kimura adapting Rein Kuwashima's character designs for animation and serving as chief animation director, and Akiyuki Tateyama composing the music. It aired from April 7 to June 30, 2023, on Tokyo MX and other networks. The opening theme song is "Gyakuten Geki" (逆転劇, "Turnabout Drama") by Tsukuyomi, while the ending theme song is "Hachimitsu" (ハチミツ, "Honey") by Shikao Suga. Crunchyroll streamed the series, and premiered it along with an English dub. Muse Communication licensed the series in Asia-Pacific. The initial streaming of the series' 13th and final episode was inexplicably delayed by two days, which ended up airing on June 28, instead of June 26.
A new anime project was announced during the "Fantasia Bunko Daikanshasai Online 2023" livestream on October 14, 2023.

#### Episodes

| No. | Title | Directed by | Written by | Storyboarded by | Original release date |
| 1 | "To Another World" Transliteration: "Isekai e" (Japanese: 異世界へ) | Shingo Tanabe | Shin Itagaki | Shingo Tanabe | April 7, 2023 (2023-4-7) |
| Middle school student Yūya Tenjō has been bullied since childhood due to his obesity, even by his own parents, who prefer his more attractive brother and sister. Yūya lives alone in a house he inherited from his grandfather, the only one to treat Yūya kindly. One day he saves a girl, Kaori Hojo, from thugs but is badly beaten in the process. Later, he discovers a secret portal to a cottage in another world that operates like a video game. The cottage comes supplied with powerful weapons, and while experimenting with his skills, a powerful monster appears outside the cottage's magic barrier. From inside the barrier, Yūya kills the monster and immediately gains 100 levels, evolving his body and making him tall, muscular, and handsome. Using a skill to trade items for Japanese currency, he buys new clothes before returning to Japan for his first day of high school. His former bullies are stunned by his transformation, but his jealous siblings continue to bully him. They are interrupted by the arrival of Kaori, who somehow knows who he is. ||||||
| 2 | "Ōsei Academy" Transliteration: "Ōsei Gakuen" (Japanese: 王星学園) | Kazuki Sawada | Yūichirō Takeda | Shingo Tanabe | April 14, 2023 (2023-4-14) |
| Due to him saving her, Kaori's father, chairman of the elite Ōsei Academy, offers Yūya a place at Ōsei. His siblings attempt to push Yūya aside, claiming they are better suited to Ōsei, but having investigated them, Kaori rejects them as spiteful bullies. Yūya leaves with Kaori, leaving his siblings humiliated and furious. He worries about fitting in, but the chairman assures him Ōsei values strength of character over grades, making it easier to hone skills and have fun. As a trial, Yūya attends a science class run by Ms. Sawada, where most female students are smitten with his good looks. Yūya becomes tentative friends with Ryō and Shingo and is overwhelmed by people treating him with actual kindness, so he agrees to transfer to Ōsei. Kaori shows him the nearby shopping center and insists they use each other's first names while sharing snacks. Many eavesdropping students assume they are on a date, embarrassing Yūya. He decides to return to the other world for fun, but this time encounters a girl named Lexia, whom he rescues from a monster. Unsure what to do, he sneaks away unseen once her guards arrive. ||||||
| 3 | "Life Changes" Transliteration: "Jinsei no Henka" (Japanese: 人生の変化) | Yukina Hiiro | Yukina Hiiro | Yukina Hiiro | April 21, 2023 (2023-4-21) |
| Yūya decides to spend some of his new wealth on clothes. While shopping, he is grabbed by a photographer named Hikaru as a replacement for male celebrity model Shō and takes part in a photoshoot with professional model Miu, who is drawn to Yūya's inexperience and charm. Shō abruptly shows up late and forcefully flirts with Miu. When Yūya intervenes, Shō tries to punch him, only for Yūya to instinctively defeat him. Due to the cameras still recording, Shō is exposed online as a scumbag, destroying his career. Despite enjoying himself, Yūya declines Hikaru's offer of a modeling contract to focus on his studies, but Hikaru insists on paying him with free designer clothing. In the other world, Princess Lexia of Arselia is determined to thank her anonymous hero and stubbornly returns to the dangerous forest with her guards to find him. Yūya visits the other world and finds Lexia and her guards under attack again, so he rescues them, and Lexia abruptly asks Yūya to marry her. In Japan, Miu's boss is determined to hire Yūya before other modeling agencies get to him. ||||||
| 4 | "A Step of Courage" Transliteration: "Yūki no Ippo" (Japanese: 勇気の一歩) | Kiyotaka Suzuki Yūki Ōshima | Fuji Sasa | Shin Itagaki | April 28, 2023 (2023-4-28) |
| After Lexia's sudden proposal, proper introductions are made, and Yūya receives an invitation for an audience with her father, the king of Arselia. However, Reigar, Arselia's first prince, is most displeased that an assassination attempt against his half-sister Lexia under his orders was foiled just before Yūya rescued her. On Earth, Yūya begins his life at Ōsei Academy, where he quickly makes new friends and impresses them by spectacularly rescuing Kaede Kazama from a stray soccer shot. Later, the Red Ogre gang, commanded by his jealous twin siblings, attacks Ōsei to take revenge on Kaori. Though momentarily paralyzed by his self-doubts, Yūya gathers his courage and single-handedly takes down the entire gang. When the police arrive and arrest the gang, the Red Ogres leader tries to kill Yōta and Sora for getting them into this mess, but Yūya rescues his siblings, leaving them deeply ashamed of their past mistreatment of him. ||||||
| 5 | "New Family" Transliteration: "Atarashii Kazoku" (Japanese: 新しい家族) | Shingo Tanabe | Shin Itagaki | Shingo Tanabe | May 5, 2023 (2023-5-5) |
| On another expedition in the other world's monster forest, Yūya encounters and rescues a Black Fenrir puppy, whom he adopts as a pet and names "Night." As he takes Night for walks in his neighborhood on Earth, Yūya inadvertently draws even more positive attention to himself and also meets Kaori and Miu by chance. After Night proves more capable than his appearance suggests, he accompanies Yūya on his monster-slaying exploits, during one of which they slay a Crystal Deer, which wields both fire and water magic. A drop item it leaves behind after getting killed bestows Yūya with an instant hot bath whenever he needs it. On another trip, they discover a cave containing a man's skeletal remains and a tome labeled "The Book of the Sage." In the meantime, an infamous assassin named Headhunter is hired by Reigar's agents to kill Princess Lexia. ||||||
| 6 | "The Sage and Magic" Transliteration: "Kenja to Mahō" (Japanese: 賢者と魔法) | Tomohiro Yoshida | Kazuyuki Fudeyasu | Tomohiro Yoshida | May 12, 2023 (2023-5-12) |
| The book is the journal of the Sage, the original owner of Yūya's cottage, who mastered every known skill and was invited to become a god, but declined in favor of retaining his humanity. The book warns Yūya to cultivate friends who will never fear him, no matter how strong he becomes. Responding to Yuya's desires, the book grants him the Sage's magical power and teaches Yūya and Night everything about using magic. At Ōsei, the students are invited on a two-day camping trip. Yūya's group includes Kaede, Akira, and Rin. Yūya's friends, including Kaori, take him shopping for camping gear. The girls are separated from the boys and trapped by a fire, but Yūya uses magic to rescue them. In Arselia, King Arnold learns of Lexia's proposal to Yūya and concludes that Yūya must have seduced her. Additionally, a girl with a dark aura confronts the Divine Rabbit, God of Kicks, and announces she will destroy the world. ||||||
| 7 | "An Encounter in the Woods" Transliteration: "Mori no Naka no Deai" (Japanese: 森の中の出会い) | Kazuki Sawada Shingo Tanabe | Yūichirō Takeda | Shingo Tanabe | May 19, 2023 (2023-5-19) |
| While continuing to explore the forest, Yūya and Night encounter a girl being menaced by a group of goblins. Despite Night strangely trying to keep him away from her, Yūya saves the stranger. The girl introduces herself as Luna, claiming she came into the forest for training. After Yūya treats her with a kindness she never experienced before, she falls for him and asks him to help her improve, which he readily agrees to. Sometime later, Yūya is forced to take a break from their team-up in favor of his field trip to a mountainous piece of land owned by Ōsei Academy. To the students' bafflement, they must spend this weekend sleeping outdoors and foraging for food. Yūya once again impresses his fellow students by hand-catching fish for dinner. In the other world, however, Luna is revealed to be Headhunter. ||||||
| 8 | "Off-Campus Study Trip" Transliteration: "Kōgai Gakushū" (Japanese: 校外学習) | Chinatsu Hasegawa | Chinatsu Hasegawa | Chinatsu Hasegawa | May 26, 2023 (2023-5-26) |
| After returning to camp, and as the only one of his team with cooking skills, Yūya turns the foraged ingredients into a delicious meal, causing Ms. Sawada to promptly propose to him, much to the perturbation of Yūya's female admirers. The next day, a wild bear strays into the camping area. When Ms. Sawada is attacked, Yūya subdues the beast bare-handedly, and the academy administration decides to keep it around as a guard animal. On the day he is scheduled to meet Lexia's father, Yūya thwarts Luna's attack on the Princess and knocks her out. Unable to believe she is evil, and curious about her reasons, Yūya, spontaneously joined by Lexia, teleports them all to the Sage's hut to treat Luna's injuries. ||||||
| 9 | "The Princess and the Assassin" Transliteration: "Ōjo to Ansatsusha" (Japanese: 王女と暗殺者) | Shingo Tanabe | Shingo Tanabe | Shingo Tanabe | June 2, 2023 (2023-6-2) |
| After learning about Yūya's relationship with her, Lexia questions Luna, who reveals her life's story before she became an assassin for the Guild of Darkness, and her latest mission is to kill Lexia. Expecting to be executed, Luna is surprised when Yūya and Lexia extend their friendship to her. The Princess appoints Luna as her bodyguard, and both ladies declare their affection for Yūya to each other. After spending the night in the hut, Yūya escorts the two ladies to the edge of the forest, where he parts ways with them since he has school the next day. Afterward, Yūya and Night are joined by a little scarlet boar, whom Yūya names "Akatsuki." Back on Earth, Yūya participates in a soccer trial competition for the upcoming academy's ball sport games, where he continues to stand out even as a goalie. The same afternoon, Miu's boss tracks him down at Ōsei. ||||||
| 10 | "Master and Apprentice" Transliteration: "Shishō to Deshi" (Japanese: 師匠と弟子) | Kazuki Sawada Shingo Tanabe | Shin Itagaki Yukina Hiiro | Shingo Tanabe Yukina Hiiro | June 9, 2023 (2023-6-9) |
| Miu's fashion magazine manager approaches Yūya as he leaves school, only to be refused. Still, when she learns of the impending sports competition, she decides to take pictures of Yūya participating in the event. While on another monster-hunting expedition deeper within the Demon's Den, Yūya is aided by the Divine Rabbit, who has been observing his progress and has chosen him to be his successor as the bearer of the Divine Kick. After hearing about the equilibrium maintained between two groups of advanced beings, the benevolent Divines (of which the Rabbit is a member) and the destructive Viles, Yūya agrees to get trained to protect his friends in both worlds. When the sports competition begins, Yūya ends up wrecking the table tennis and volleyball disciplines, but succeeds in helping Kaori in her tennis match, prompting Kaori to kiss him on the cheek. When next facing his Vile opponent, the Rabbit surprises her with the magic Yūya taught him as recompense for the training, whereupon she decides to target Yūya for elimination first. ||||||
| 11 | "To the Royal Capital" Transliteration: "Iza Ōto e" (Japanese: いざ王都へ) | Yasunori Gotō | Kazuyuki Fudeyasu | Shingo Tanabe | June 16, 2023 (2023-6-16) |
| Yūya and Kaori begin spending more time together as they prepare for their midterm exams. While in Yūya's home, Kaori accidentally discovers the gate to the other world; Yūya divulges his secret to Kaori, and she promises to keep it. In the capital of Arselia, Lexia introduces Luna to her father, and as the circumstances for Luna's conversion are explained, King Arnold grows even more enraged at Yūya's "indecencies" against his daughter. Upon hearing this news, Reigar decides to accelerate his plans to assassinate his father and Lexia and claim the throne. After gaining a holiday following the competition, Yūya goes to the royal palace to meet the king, but his awkwardness worsens the king's bad impression of him even more. Reigar's agents attack with a magic-suppressing barrier, but Yūya handily defeats the assailants. Lexia chides her father for his temper, and proof of Reigar's involvement is discovered. ||||||
| 12 | "The Mysterious Assailant" Transliteration: "Nazo no Shūgekisha" (Japanese: 謎の襲撃者) | Kazuki Sawada | Shin Itagaki | Shingo Tanabe Shin Itagaki | June 23, 2023 (2023-6-23) |
| Even with Reigar still at large, Lexia and Luna (with Owen for additional protection) give Yūya a tour of the capital. As they pass the local Adventurer's Guild, Luna spontaneously decides to register herself and Yūya. When Yūya is tested for his magical capabilities, the results, far beyond normal, draws much attention. While Yūya and the ladies are on an herb-gathering quest, Reigar's whereabouts are discovered, and Owen asks Yūya to help apprehend the treacherous prince. Reigar is captured alive, and then the Vile girl appears, revealing she had exploited Reigar into attempting the coup d'état to initiate a genocidal war, and prepares to kill everyone present. Yūya deflects her attacks with his magic and the Vile girl retreats. On Earth, Kaori vainly tries to visit Yūya. ||||||
| 13 | "Yūya and Kaori" Transliteration: "Yūya to Kaori" (Japanese: 優夜と佳織) | Shingo Tanabe | Shin Itagaki | Shingo Tanabe | June 30, 2023 (2023-6-30) |
| Back at the royal palace, Yūya is asked to participate in Reigar's trial. Reigar states that after Lexia accidentally burned him when her magic went out of control years ago, he let himself be consumed by his rage against her. Reminded of his old life, Yūya uses a magic elixir he's made to cure the Prince. Lexia, unable to hate her brother, exerts her will and gives him a full pardon for his crimes against her, and as a reward for his actions, King Arnold knights Yūya and gifts him Reigar's former estate. Yūya keeps worrying about the Vile girl so much he begins neglecting his friends as he frantically decides to level up for their next confrontation, but the Vile girl ambushes him during his training run. Worried about Yūya, Kaori goes through the portal and enters the Demon's Den, where she witnesses their battle. Usagi appears and pleads with the girl, whom he calls Yuti, to stop the fight, reminding her that her late master was a Divine and a protector of humanity, even as they killed him. Yuti refuses to relent and unleashes her full power, only to be disabled by Akatsuki. This allows Yūya to take her down, and Usagi leaves her in his care. Afterwards, Yuti finally understands that what she's doing is wrong and gives up her desire for revenge. Despite all she has seen and heard, Kaori assures Yūya of her continuing trust in him. In the ending credits, Kaori meets and befriends Lexia and Luna; Yūya and his siblings patch up their relationship; and a now-reformed Yuti emigrates to Earth and enrolls at Ōsei. ||||||

### Game

A free-to-play MMORPG browser game, titled I Got a Cheat Skill in Another World and Became Unrivaled in the Real World Too: Parallel Universe, was announced on March 17, 2023. It will be launched on the G123 platform in multiple languages.

## Reception

In May 2018, the web novel won the Grand Prize at the 3rd Kakuyomu Web Novel Contest in the Science Fiction/Modern Fantasy Division. By October 2023, the series had 3 million copies in circulation.