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Fanfic / Let the Darkness Bring Us Into the Light

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Yuugi was never interested in becoming a hero. But he's always wanted friends. Friends who he could rely on, and who could rely on him, no matter what. And after meeting Izuku, Yuugi's determined to support Izuku as Izuku becomes a hero. Even if it means getting involved in heroics, getting dragged into way too many fights, being around way too many loud people, and winding up involved with too many dumb secrets.


Let the Darkness Bring Us Into the Light is a Yu-Gi-Oh!/My Hero Academia Fusion Fic written by arinrowan. The story focuses on the early years of Yuugi Muto, the boy who would be King of Games, as he tries to make sense of the world and maintain his new friendships. But things aren't so easy when the world he's living in is one where heroes come alive and dictate the value of a person. This is the first installment of the Lost in the Infinite Lights series. The sequel, Shed Some of This Black Light to Surrounding Towns, is currently ongoing and has it's own page.


Let the Darkness Bring Us Into the Light provides examples of:

  • Adaptational Backstory Change: In the original series, the Ishtar family was a group of tombkeepers who endured horrid abuse from the patriarch which resulted in Marik killing him with his Yami and then leaving to take revenge on the Pharaoh. In this story, the Ishtars participated in quirk marriages with the patriarch wanting a son to lead his family. One day, however, the father would abuse Rishid to the point that Marik intervened and killed him. Marik, or whatever replaced him, abandoned the family shortly afterwards. While Rishid works himself to the bone to look for any potential leads for his brother, Ishizu has decided to focus on preserving what remains of her family.
  • Adaptational Early Appearance:
    • Pro Heroes such as Endeavor, Midnight, Present Mic in civilian form, and Eraserhead make appearances before the main events of the BNHA storyline take place. Even Nighteye appears in disguise in order to see Yuugi's future.
    • Advertisement:
    • Detective Tsukauchi would appear as a recurring figure for Yugi's quirk counseling by the Ishtar Siblings.
  • Adaptational Job Change: Alot of Yu-Gi-Oh characters have new jobs to fit in this new reality.
    • Ms. Chono, from the manga, now teaches elementary instead of high school.
    • Rishid Ishtar now works as a quirk psychologist.
    • His sister Ishizu is now a college major instead of a museum curator.
  • Adaptation Relationship Overhaul:
    • Yuugi's Grandpa is now his maternal grandfather instead of paternal.
    • In their original series, Yuugi and Seto were designated rivals with the latter refusing to see Yuugi as anything other than a worthy opponent. In this story, Seto was actually one of Yuugi's first friends before he was transferred to the foster care system after the death of his parents. And thanks to a chance encounter courtesy of Stain and Yami, Yuugi gets to continue his friendship with him while Seto tries, and fails, to keep things professional.
    • In the original, Yuugi and Jounouchi became friends in high school and the blonde was more of a bully who picked on Yuugi for not being a man. In here, they meet in middle school and while Jounouchi is annoyed with Yuugi always finding him during his fights, there's no antagonism driven by toxic masculinity and the two become close friends. It also helps that Jounouchi bonds instantly with Izuku thanks to their love of heroes.
    • It's heavily implied that Yuugi and Judai Yuuki from Yugioh GX are paternal cousins as Yuugi's father's surname is Yuuki.
    • Anzu Masaki doesn't have a crush on Yuugi like in the original and only sees him as a good friend.
  • Adaptational Sexuality: Shouta Aizawa and Hizashi Yamada are in a romantic relationship with each other.
  • Adapted Out:
    • As of now, there is no significant word on what happened to Hiroto Honda.
    • Regarding plot events, the Sludge Villain Incident was omitted and Izuku earned Toshi's favor through chance encounters and meaningful conversations.
  • And Now for Someone Completely Different: The story is strictly told through Yuugi's perspective. This changes only once in the last scene of Chapter 10 where Yami awakens and decides to punish Bakugou.
  • Author Appeal: The creator has an exceptional dislike for Endeavor so you can find Yuugi and his friends ripping on him when given the opportunity.
  • Been There, Shaped History: According to Ishizu, the Yuuki family has been one of the most influential families in Japan both before and after the emergence of quirks. After obtaining their own empathy quirks, they decided to participate in arranged quirk marriages to strengthen their power and even had a hand in advocating for quirk acceptance in society.
  • Birds of a Feather: Izuku and Jounouchi get along like peanut butter and jelly thanks to their passionate love and analysis of hero culture.
  • Break-Up/Make-Up Scenario: Yuugi and Izuku go through this in Chapter 6-7 when the former tries to get his friend to stop defending Bakugou when he continues to gain more wounds while the latter is frustrated with Yuugi not letting the problem go.
  • Bullying a Dragon: Unfortunately for Bakugou, provoking Yugi results in his other self unleashing a Mind Crush attack that nearly destroys Bakugou's sanity.
  • Bullying the Disabled: Katsuki Bakugou terrorizes Izuku due to his quirkless nature. He also goes after Yuugi when given the opportunity and calls him "retarded" to mock him.
  • The Cameo:
    • Miho Nosaka, from Season 0, appears as an elementary school friend of Anzu.
    • Yuugi mentions having met a shark toothed kid (Kirishima Eijirou) during one of Jounouchi's fights in Chapter 18.
  • Cast Full of Gay: A majority of Pro Heroes are revealed to be on the spectrum and the boys casually talk about LGBTQA themes among themselves without fear or prejudice.
  • Childhood Friends: Yuugi met Izuku when they were 8 years old and have been best friends for years to come.
  • The City Narrows: Jounouchi frequently mentions how he grew up on the poorer side of Mosu Epusa where he used to be involved with delinquent gangs and how many of his neighbors would be recruited into villainy.
  • Comically Missing the Point: When Tokage tries to explain that rivalries are more valuable then friendships.
    Tokage: "Rivals are more valuable. Friends don’t make you stronger. Having a rival does. Look at Endeavour and All Might."
    Yuugi: "…Hasn’t Endeavour been the number two for like, twenty years?"
    Tokage: "NOT THE POINT".
  • Cool Big Sis: Nemuri tries very hard for Yuugi to think of her as one.
  • Crazy Cat Lady: Subverted with Tanaka-ba. She spends her twilight years taking care of cats and breeding them, but she's also one of the wisest and most dependable adults in the story.
  • Death by Adaptation:
    • Yuugi's mother is deceased in the story.
    • Hirutani, Jounouchi's gang friend turned enemy, is sliced to death after trying to convince the Hero Killer Stain to work for him.
    • Stain himself ends up dying before the major events of the MHA story thanks to gaining scratches from Kuriboh that unintentionally result in an allergic reaction.
  • Disabled in the Adaptation:
    • Yuugi is diagnosed with autism. The story focuses on him and his Grandpa managing his autism along with how he perceives the world around him.
    • Shizuka Kawaii and Mokubua Kaiba are stated to be quirkless.
    • Isis Ishtar has a limp and uses a cane to walk after her brother Malik attacked the family in a traumatic episode.
  • Disappeared Dad: Yuugi's father walked out of the family after his mother's death and Izuku's father left the household after he was diagnosed as quirkless. It's not a topic that either boy is comfortable with discussing.
  • Early-Bird Cameo: Toshinori appears in Chapter 7 as an unnamed stranger that Yuugi meets during a public hero fight.
  • Fire-Forged Friends: Yuugi, Izuku and Jounouchi solidify themselves as a friendship trio in Chapter 9 when the boys protect each other from school thugs who were after the blonde street rat.
  • Foreshadowing:
    • There are alot of clues about Tokage, one of Yuugi's elementary friends, being Seto Kaiba.
      • His quirk involves being able to communicate with lizards which is a reference to Seto's appreciation for the Blue Eyes White Dragons.
      • He's described as having a serious and blunt personality, especially with how he interacts with Yuugi.
      • He's regarded as one of the smartest kids in his classroom.
      • He states that having rivals makes a person stronger over having friends.
    • Tanaka-ba describes Hirutani as a frog in a well who's dream of living in the ocean is going to get him killed. Hirutani's obsession with rising as a criminal leader will result in his death by the hands of Stain.
    • While discussing conspiracy theories with his friends in Chapter 12, Jounouchi mentions how a quirk can be transferred by eating a person's hair.
    • When meeting Toshinori Yagi, Yuugi senses that more than one being is residing in him and asks out loud if he has six or seven people in his head. This is reference to the Vestiges of One For All that reside in the current holder.
    • In Chapter 17, a newspaper headline reads Kaibacorp Aerospace Acquisition: New Expansion? The end of the story reveals that Seto's new projects will focus on space travel.
  • Gender Bender: Jounouchi's quirk involves turning into a girl (and back into a boy) whenever he gets stimulated or worked up.
  • Gender-Neutral Writing: Sugoroku refers to Jounouchi as they/them.
  • The Ghost:
    • Dr. Tsubasa is mentioned as Yuugi's doctor and is partly responsible for awakening his quirk after calling him for a seasonal shot.
    • Although he isn't outright named, Jounouchi references All For One when discussing the hierarchies of crime organizations.
  • Holding Hands: In order to navigate the mindscape or switch places, Yuugi and Yami often hold hands to get their quirk to work.
  • I Did What I Had to Do: Nighteye justifies himself trying to see Yuugi's future as he believes that the boy will be directly responsible for All Might's demise.
  • I Just Want to Be Normal: Yuugi isn't interested in being involved in hero society and would be perfectly fine living as a quirkless person.
  • I Just Want to Have Friends: Both Yuugi and Izuku wished for this as they were both loners who were constantly bullied and ostracized for being different. Them being each other's first best friend is what motivates the two to support their relationship no matter what obstacles they face.
  • I'm Standing Right Here: In Chapter 10, Yuugi drags Present Mic by explaining why he doesn't like him along with all of the incidents he's caused with his voice quirk. He does this in front of Nemuri and a very upset Hizashi.
  • In Spite of a Nail: While being a crossover with another series and undergoing drastic plot points, Izuku still becomes All Might's successor.
  • It Runs in the Family: The maternal side of Yuugi's family is known for having probability themed quirks while his paternal side have empathy quirks.
  • Kick the Son of a Bitch: After only knowing Bakugou for less than a minute and seeing him taunt his friends, Jounouchi manages to punch and restrain him with relative ease.
  • Killer Rabbit:
    • Tanaka-ba's cat Ra has an unsettling reputation as a gritty feline. His victims include birds of prey, foxes, tanukis, koi, and depending on who you ask, a burglar who tried to steal from his master's home.
    • His progeny Kuriboh is already following in his footsteps as they managed to viciously attack Stain for harming his master. And the bites and scratches resulted in an allergic reaction that killed the Hero Killer.
  • Light 'em Up: Anzu has a quirk that makes her body shimmer whenever she moves alot.
  • Mental World: The concept of "Soul Rooms" are used here as Rishid uses this to explore a person's mindset; the room takes on a radical appearance that reflects the mentality and well being of a given person. And just like in the canon story, Yuugi's room is a children's playroom filled with toys and games while Yami's room is an elaborate maze designed to keep out unwanted visitors.
  • A Minor Kidroduction: The opening scene of Book 1 features Yuugi meeting Izuku in the park when they were in grade school and asks if he wants to play a game with him.
  • Mythology Gag: There are tons of references to the Yu-Gi-Oh franchise and the My Hero Academia series.
    • Yugi uses All Might's answer ("You can be a hero, Izuku") when his best friend asks him out of desperation.
    • Ms. Chono is stated to melt her face whenever she becomes agitated; this is a reference to her Penalty Game from the manga.
    • Tanaka-ba names her cats after classic Duel Monsters, one of which is named Ra.
    • Yuugi names his new cat Kuriboh.
    • Izuku claims that "his body moved on its own" when he saw Jounouchi and Yuugi fighting delinquents.
    • Jounouchi mentions how he can't put on his shoes without checking for scorpions after an incident involving a guy with an arachnid themed quirk. This is reference to one of the manga plots where the shoe merchant did a similar trick. Yami would encounter, and traumatize, the same person after Hirutani hires him.
    • After Yami's awakening, Izuku suggests naming him Atem or Dark Shadow.
    • The Best Friend Squad mention having a run-in with Hirutani who attacked them with yo-yos.
    • Eraserhead owns a cat named Obelisk the Tormentor.
    • The last chapter is called "Something you can show, but can't see", a reference to Jounouchi's riddle.
    • Seto Kaiba shows an interest in developing space exploration technology, just like in GX and Dark Side of Dimensions.
  • Not Distracted by the Sexy: Yuugi isn't fond of having to interact with Midnight while she's wearing her Dominatrix themed hero uniform. Justified since he's just a kid and isn't interested in stuff like that.
  • Nothing Is the Same Anymore:
    • Izuku informs his mother about Bakugou's bullying and attends a different middle school.
    • Stain is killed before the boys go to Yuuei
  • Original Character:
    • Shinsou-kachou, a purple police chief who Yuugi frequently meets do to him getting involved in hero fights. It's implied that she's related to Hitoshi Shinsou.
    • Tanaka-ba, a Cool Old Lady who is a family friend to the Mutos and is also Midnight's aunt.
    • Yuuki Kyuudai and Nagare: two Pro Heroes who come from a prestigious family and are also Yuugi's estranged father and cousin respectively.
  • Pet Monstrosity: Yami ends up owning a scorpion named Socks after his owner tries to attack Yuugi.
  • Pet the Dog: According to Yuugi, various Yakuza members would give him free tokens as a sort of apology for the boy getting caught up in their violent conflicts.
  • Positive Friend Influence: Yuugi, Izuku and Jounouchi are shown to be this to each other as they constantly provide love and emotional support for one another throughout their adventures making them into better people. It's because of this that Tanaka-ba uses her connections to help Jounouchi enter Yuuei so that he can continue being friends with Yuugi and Izuku for another three years.
  • The Promise: Even though he doesn't want to be a hero, Yuugi vows to follow Izuku to Yuuei so that he won't be alone on his journey.
  • Pronoun Trouble: The writer uses she/her pronouns whenever Jounouchi becomes a girl in the story and vice versa when he's a boy.
  • Ragtag Bunch of Misfits: In Jounouchi's words, the Super Pal Trio consists of a quirkless hero otaku, an autistic quirk probie, and genderfluid Mosu Epusa street trash.
  • Raised by Grandparents: Yuugi is raised by his Grandpa Sugoroku after his mother's passing.
  • Running Gag:
    • The ongoing debate as to whether Endeavor can fart fire.
    • Yuugi trying to kick people in the shins.
  • Sadist Teacher: Ms. Chono is just as cruel-hearted as she was in the original as she's purposefully been failing Yuugi, even though he's answered his assignments correctly, out of spite.
  • Shout-Out: Chapter 12's title "do you know do you know have you heard the news" is a direct quote from the Shadow Play Girls.
  • Shown Their Work: The author has put exceptional effort in describing Yuugi's autism and what strategies he and his grandfather use to manage it. The same can be said for going into detail when it comes to concepts pertaining to Japanese culture, such as butsudan or family registers.
  • Shrine to the Fallen: The Mutos have a shrine dedicated to Yuugi's mother and Sugoroku's wife. It's a household rule where Yuugi would have to pay respect to them everytime he survived a serious situation unharmed as it was his mother and grandmother protecting him.
  • Sick Episode: The second half of Chapter 7 discusses how Izuku, Sugoroku and Yuugi end up sick from a seasonal flu and need shots as a result. However, Yuugi obtaining the vaccine Trigger would result in the awakening of his quirk and "Yami" in later chapters.
  • Sink-or-Swim Mentor: Playfully discussed in Chapter 9. Even though he agrees to teach Izuku how to street fight, Jounouchi tries to scare him by saying that one of his training methods can involve throwing a vending machine on top of him. The boys then discuss the dynamics and details for Jounouchi's Training from Hell methods.
  • Sole Survivor: The vaccine Trigger which was revealed to have been contaminated resulted in 301 out of 500 people having a severe reaction to the vaccine. And of those 301, only five were able to make it out alive. Yuugi, Ishizu, and her brother Marik are three of those five with the fourth being in a vegetative state and the fifth having fled Japan.
  • Spoiler Title: Chapter 10 is called "The One You've All Been Waiting For". Aka Yami's debut.
  • Synthetic Plague: Related to the Sick Episode trope, the public is requested to take a vaccine called Trigger to help prevent an ongoing flu. According to Tanaka-ba, close to 300 people have died after taking that shot and Yuugi was fortunate enough not to die from it's effects.
  • Take That!: As another jab at Endeavor in Chapter 7, Tanaka-ba proclaims that only assholes train primary school kids to fight.
  • That Man Is Dead: In Chapter 17, Ishizu declares that her little brother is dead and she isn't interested in learning about the man who took over him.
  • The Talk: Tanaka-ba has one with Jounouchi regarding how his quirk will influence his puberty period.
  • Title Drop: The first scene of Book 1 has Yuugi asking Izuku a question that is the same name as the chapter title.
    Yuugi: Do you want to play a game?
  • Toilet Humour:
    • Yuugi has an ongoing debate with Izuku over whether Endeavor can fart fire or not.
    • In Chapter 10, the three amigos engage in a good laugh discussing what type of hero King Explodo Toilet would be.
  • Weirdness Magnet: Yuugi has the misfortune of being close to dangerous events where heroes have to intervene to save the day. This is something that he is aware of and his friends openly discuss.