Top 20 Mature Modern AU Fanfics
Ranked by AO3 kudos. Every fic on this list is tagged with modern au and rated Mature.
The Student Prince
by FayJay
A Modern day Merlin AU set at the University of St Andrews, featuring teetotal kickboxers, secret wizards, magnificent bodyguards of various genders, irate fairies, imprisoned dragons, crumbling gothic architecture, arrogant princes, adorable engineering students, stolen gold, magical doorways, atte
in love and war and politics
by centuriesofexistence
It's the most watched Senate race around the country, and Clarke Griffin is running one hell of an underdog campaign against the favored Cage Wallace. But she has a secret weapon that might save the campaign--and a secret that might ruin it. And both are named Lexa Ward.
Do You Think the Universe Fights for Two Souls to be Together?
by BottomLexa
Lexa gets her tattoo with her soulmate's name before Clarke and is very much confused because "Clarke is a guy's name and I'm not...into guys...?" And Clarke is the new girl in school who thinks the brunette in her history class is very cute. (You can expect fluff and a lot of Clexa).OR Soulmate!AU
As long as we stay together (if we just stay together)
by HerotheHardWay
Adora is an Astrophysics PhD student who just can’t seem to write her dissertation. When the opportunity arises to work at the IceCube Neutrino Detector at the South Pole, she jumps at the chance, even though she’ll be stuck there for six months during the Antarctic Winter. When she arrives, she dis
Oh God...She's Hot
by Mikotyzini
Having moved away from Vale years ago, Weiss isn't thrilled when a job relocation sends her back to the city of her youth. While searching for an apartment, however, she reconnects with a childhood friend who...aged extremely well - so well that Vale's weather isn't the only thing hotter than Weiss
Blue light pulls in through. The long crack in my wall.
by JustRosey
Tommy Shelby lands himself in the hospital with a TBI (traumatic brain injury) and Alfie Solomons is a physiotherapist - stuff happens. This is my first Modern!AU for Peaky Blinders, and I am a bit nervous about it so please be kind :)Prioritized this fic based on a poll - the people of Tumblr have
Swelter Weather
by avisioninorange
Colin Bridgerton is weary from travel and decides to spend the summer at the Aubrey Hall. While his initial plans were to avoid his perfect family, he ends up sharing the house with Eloise and Penelope. This is a Modern AU!
Crossfire
by shadowdaddyforlife
Aleksander Morozov, age 39. A former SEAL commando, taken from his home country by his parents as a child. Betrayed and fleeing his past to begin a new life and start his own business.Alina Starkova, age 27. The daughter of an undercover agent, a nurse. Trapped in a country torn apart by war.He emba
Online heart
by Dancer612
Caleb can’t sleep. Not with the scars. Not with the itch. Not with the memories. Not with Trent Ikithon still living somewhere in his head. One night, he finds a Twitch stream. The man behind the screen name ‘LogicalGhost’ is calm, brilliant, and impossible to look away from—playing horror games lik
Hawkins Mystery Incorporated
by aperson220
The plan was supposed to be simple, Run a detective agency, Solve a few cases. Make some money. Graduate. But Instead, it turns into this: A cheating scandal.A blackmail account.A school full of secrets that refuse to stay buried. As anonymous posts start exposing everyone—from hookups to hidden liv
The Devil's Queen
by Dweller_From_Hell
New York belongs to Ben Solo. (He's older) Every street, every deal, every whispered threat traces back to the man everyone fears. Cold. Calculating. Untouchable. Then he meets his waitress. Rey is broke, overworked, and one missed paycheck away from disaster. She should probably be alarmed when New
Into our bodies bound
by Rimeko
“I, for one, have never asked money from an hitchhiker, especially when I was the one to offer the favor. It’s just about doing something nice, right?”This time, he caught the exact word that made the corner of Astarion’s mouth twitch—“favor”.“Though,” Wyll adds, “I won’t say no if you insist on spl
Summer Does Not Abdicate
by Euryalus
Set in a modern, militarizing New Orleans, the story follows students, artists, service workers, and strays as they orbit one another—through organizing meetings and art collectives, addiction and recovery, protest and police lines. Some of them believe in the law. Some believe in nothing at all. Al
Society, Scandal & Sunday Lunch
by PenelopeR
In modern London, the Bridgertons are famous, beloved, chaotic, and watched by everyone from Queen Charlotte to the gossip columns. With Edmund Bridgerton very much alive and Violet determined to keep her family close, Sunday lunch at Bridgerton House becomes the usual mix of noise, love, teasing, s
sing us a song (you're the piano man)
by FPwoper
Edward Teach is fed up with his job as a concert pianist. He’s over having to play the same classical pieces over and over again to polite applause. When he walks into The Lighthouse, a newly opened queer bar, and spots a grand piano in it, he figures he might have found something new and exciting,
So Let the Mountain Crumble
by cinderslice
“I can’t stand you,” Zuko says with earnest annoyance. “I can’t stand you either,” Sokka says. It sounds a whole lot like I love you. “Come on, you poor, sad baby, let’s go to bed.” Or: Sokka has been running from his broken heart for years, but when his father calls and tells him to come home, he p
Hot Summer, Warm Blood
by jar_of_mayonnaise
Small town, hot summer. Jean’s life is boring and predictable: he works the same odd jobs, he has the same two friends he’s always had, and he’s never left his hometown. Until one night at the bar, he runs into a mysterious local that he’s never met before and his day-to-day, or rather night-to-nigh
Sunflower
by LuckyCasca
A modern AU set in an Australian University.Guts has a moment with Casca and she struggles to come to terms with what happened at New Years while navigating university.
Invierno azul
by Londonitsblue
No summary provided.
【马让】Room no.9 第二棒
by Gesea
2026年7月6号，马让日文手接龙活动的第二棒。
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About This List
This list of 20mature Modern AU fanfics spans 1,363,322 total words. Kudos range from 7 on the newest entries to 25,009 on the most established. 45% are marked complete — check the status flag before committing to a longfic. The most common rating is Mature (20 of 20 fics).
Recurring tags across this list: Modern AU · Alternate Universe - Modern Setting · Slow Burn.
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