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Butterfly Effect

This Wasn’t in the Movie // The Avengers

One minute, you’re living a perfectly ordinary life. The next, you’re waking up in New York City. In 2018. In the Marvel Cinematic Universe. And if your encyclopedic knowledge of the Avengers is anything to go by, the events of Infinity War are about to begin. You know who’s going to fight. Who’s going to die. Who’s going to disappear when Thanos snaps his fingers. You even know how it all ends. Unfortunately, nobody told you that waking up inside your favorite movie would come with mysterious, uncontrollable superpowers. Or that the Avengers might be considerably less receptive to a complete stranger claiming to know their futures than you’d hoped. And there’s one rather significant problem. The moment you enter the story, you change it. Now the timeline is unraveling, your powers make absolutely no sense, and the only advantage you have is your increasingly unreliable knowledge of a movie you’ve watched a hundred times. You know how Infinity War ends. But this isn’t fictional anymore. And nobody is guaranteed to survive. Including you.

Alternate UniverseFix-It of SortsIsekai and TransmigrationMultiverseButterfly EffectTimeline What TimelineAngst and DramaExistential CrisisCulture ShockFound FamilyMagicAction/AdventureAmbiguous/Open EndingMovie: Avengers: Infinity War (2018)Infinity Stones | Infinity Gems (Marvel)
1.3m
@cherrydagger

The butterfly effect (Mha)

Katsuki and izuku get sent back to the past and made one tiny mistake. You fell in love with Katsuki instead of izuku in the past. In the present you are supposed to be izukus wife unfortunately due to the mess up you are katsukis wife. As the boys try to find a way to fix things katsukis falls in love with you and Izuku practically goes crazy trying to find a way to fix things.

Time TravelMidoriya Izuku is a MessBakugou Katsuki is WhippedAlternate Universe - Canon DivergenceEmotional Hurt/ComfortFalling In LoveJealousyButterfly Effect
187.8k
@emojiboobee7

The girl who knew

When 14-year-old Y/N accidentally glitches into a Slytherin group chat, she’s ripped from her world and dropped directly at the feet of Lord Voldemort. As a Muggle who has read every Harry Potter book, she holds the ultimate power: Meta-Knowledge. Named the "Heir of Secrets," she is now the most protected person in Malfoy Manor. While the Slytherin squad is forced to be her bodyguards, Y/N is playing a dangerous game. She knows everyone’s secrets, their fates, and how the war ends. But she’s not here to save the world—she’s here to see what happens when the villains win. Armed with the Butterfly Effect, she's rewriting the story, one spoiler at a time.

Butterfly EffectAlternate UniverseDark FantasyProtective SlytherinsEnemies to LoversEnemies to FriendsBreaking the Fourth WallSlow Burn
38.5k
@Voldemortswife

TWD: A Different Ending

Lee Everett was supposed to die in Savannah. He was supposed to leave Clementine behind. But what if one choice changed everything? Experience an alternate timeline where Lee survives—and every season of Telltale’s The Walking Dead is forever changed.

ChoicesAlternate Universe - Canon DivergenceSlow BurnEmotionalSurvivalInspired by The Walking Dead (Telltale Video Game)Found FamilyButterfly Effect
5k
@tittysaurus_r3x

The Future Is Not Fixed

Y/N knows how the story ends. Harry Potter doesn’t. Waking up on the Hogwarts Express should be impossible. So should knowing the future. Yet somehow Y/N finds themself living through the events of the books they once read, surrounded by people whose lives, deaths, triumphs, and tragedies are already written in their memory. Determined not to interfere, they plan to keep their head down and simply survive first year. Unfortunately, that becomes much harder when Albus Dumbledore realizes exactly what they know. Now caught between observer and participant, Y/N must decide whether changing fate is worth the risk of destroying it. After all, saving one life might cost ten others. And the future is already beginning to change.

Self-Insert as Harry PotterGolden Trio | Hermione Granger & Harry Potter & Ron Weasley FriendshipAlternate Universe - Canon DivergenceButterfly Effect
4.8k
@fcpimmy

Leaping to Reverse Time ⏳

You have limited turns to reverse time and you’ve just used one to erase your best friend Milo’s sudden confession. But erasing the moment doesn't erase his heart. No matter how many times you turn back the clock, Milo keeps trying to tell you how he feels, driven by a truth he can't keep hidden. Worse, every jump you take to dodge his words shifts your complications onto him, derailing his academic future. With your remaining turns rapidly ticking down to zero, you realize that running from your feelings might cost you the only person who mattered.

Time TravelTime Travel Fix-ItTime ShenanigansFriends to LoversLove ConfessionsButterfly EffectFriendzoneUnresolved Romantic Tension
2.4k
@Mirah888

“Party 4 U” | SCREAM (1996) X HOGWARTS

You were attending to a party hosted by your best friend—Draco Malfoy. But one call changed everything from a silly gathering amongst friends to a real life slasher horror. You’ve got 12 hours you need to survive—it’s a question on if you can outlast the Ghostface, or if he’ll outlast you.

Survival HorrorInspired by Scream (Movies)Fluff and AngstMutual PiningGetting TogetherCharacter DeathWhumpButterfly Effect
466
@victorianecho

Butterfly Effect

You were never supposed to matter to Mattheo Riddle. He was dangerous, unpredictable, and infamous throughout Slytherin House. The kind of boy people whispered about when he walked past. You knew better than to get involved with him. So, naturally, you did. It starts with something small. A seat beside him in Potions. A stolen glance across the Great Hall. A sarcastic comment in the Slytherin common room. Nothing that should change anything. But one little decision leads to another. Soon, Mattheo is finding excuses to be around you. You’re sneaking out after curfew together. Arguments turn into lingering stares, and the line between hatred and attraction becomes impossible to see. And Mattheo? He’s becoming obsessed with the one person who doesn’t seem afraid of him. But there’s something neither of you knows. Mattheo has been hiding a secret. And the closer you get to him, the more dangerous Hogwarts becomes. Because one tiny choice can change everything. One conversation. One kiss. One secret. And once the butterfly flaps its wings… There’s no going back.

HogwartsSlytherinSlow BurnDrama & RomanceButterfly EffectJealousySexual TensionAdults
474
@DaisyPoy

Extra Innings

Y/N only agreed to one baseball game with her best friends. She never expected the starting pitcher to be Noah Carter—the ex who shattered her heart and never really let her go. Now, with old feelings resurfacing and Noah refusing to stay out of her life, she’s forced to decide if some love stories deserve a second chance… or if they’re better left in the past. BE NICE I DONT KNOW WHAT IM DOING ❤️❤️

BackstoryButterfly EffectHate to LoveSportsExesBaseball
7.8k
@ummmmmmmmmmmmm

ARIRANG & SERENDIPITY

In the heart of Seoul, South Korea, two establishments couldn’t seem more different. Arirang is a warm, bustling Korean restaurant owned by Amari Parker, a fierce mother whose doors—and heart—are always open to the people she considers family. Between demanding customers, overnight shifts, complicated employees, and raising six children, Amari has built a home where blood isn’t required to belong. Across the city stands Serendipity, a glamorous casino where fortunes are won, secrets are traded, and dangerous people conduct business beneath glittering lights. At the center of Serendipity is Min Yoongi—mafia boss, casino card dealer, and father of Amari’s children Min-Hee and Min-Ho. Alongside him is Gun-Choi, Amari’s fiercely protective partner in parenthood and father of Joy and Skyla, whose loyalty extends far beyond his biological children. But their already complicated family stretches even further. Amari is also mother to Hye-Ji and Hana, whose fathers remain unknown, and adoptive mother to Ji-Woo, whose biological mother, Seon Woo-Jin, remains tangled in their lives. Then there are the people surrounding them: an undercover FBI agent, a probation officer with a mafia past, a police officer who works behind the bar, the brutally loyal OK-Ju, and the Tui siblings—each carrying secrets and loyalties of their own. When trouble inside Serendipity begins reaching the doors of Arirang, the careful separation between family and business, law and crime, loyalty and betrayal begins to disappear. Someone is watching. Someone is lying. And someone has made the dangerous mistake of threatening Amari’s family. In their world, sharing blood doesn’t automatically make you family. Loyalty does.

Hurt/ComfortKidnappingEstablished RelationshipRomanceHumorFluff and AngstImplied/Referenced Child AbuseAlternate Universe - RestaurantImplied/Referenced TortureButterfly EffectMagic RevealedHackingAlternate Universe - PoliceDark PastCute
2.7k
@AmarixParker