Spies & Secret Agents FanFiction

Parks and Recreational Activities

Parks and Recreational Activities

F/F
M/M
G
Updated
11.04.2025
Fandom
Original Work Big Bad Wolf Series - Charlie Adhara
Characters
Cooper Dayton/Oliver Park, OMC/OMC, Oliver Park (Big Bad Wolf), Cooper Dayton, Annie, Spencer, Carl, Joe Park
Tags
Slow Burn Werewolves Canon-Typical Violence Undercover Spies & Secret Agents i will attempt to write this so anyone not familiar with the series may still enjoy it Tags to be added as I go
People have been going missing in Enderton Valley with no trace for the past six months. Agent Cooper Dayton of the FBI is on the case. The locals theorize everything from the supernatural to the human type of ugly is going on.Cooper doesn’t believe...
Long Live the King (Male Reader x Crossover Harem)

Long Live the King (Male Reader x Crossover Harem)

F/F
F/M
M/M
G
Updated
11.04.2025
Fandom
僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga) 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime) 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga)
Characters
Makima (Chainsaw Man), Toga Himiko, Uraraka Ochako, Gojo Satoru, Sukuna | Ryoumen Sukuna, Ruby Rose (RWBY), Yang Xiao Long, Cinder Fall, Weiss Schnee, Blake Belladonna, Kanroji Mitsuri, Kochou Shinobu,
Tags
Magic Dragons Chaos Sex Vampires Death Supernatural Elements Reincarnation Crossover Assassins & Hitmen Spies & Secret Agents Multiverse
Different mission calls for a different view

Different mission calls for a different view

F/F
G
Updated
11.04.2025
Fandom
She-Ra and the Princesses of Power (2018)
Characters
Adora/Catra (She-Ra), Adora & Catra (She-Ra), Adora (She-Ra), Catra (She-Ra), Glimmer (She-Ra), Bow (She-Ra), Shadow Weaver | Light Spinner (She-Ra)
Tags
Secret Identity Spies & Secret Agents Adora is a spy
Adora is a secret agent with a special mission: find and capture her boss's daughter, Catra.Everyone told her it was impossible, perhaps they tried with the wrong methods.
Mrs & Mrs Harkness-Vidal

Mrs & Mrs Harkness-Vidal

F/F
G
Updated
11.04.2025
Fandom
Marvel Cinematic Universe Agatha All Along (TV)
Characters
Natasha Romanov (Marvel), Agatha Harkness/Rio Vidal, Agatha Harkness, Rio Vidal, Billy Maximoff, Jennifer Kale, Alice Gulliver, Lilia Calderu, Wanda Maximoff, Nicholas Scratch (Marvel), Agatha Harkness & Nicholas Scratch (Marvel) & Rio Vidal
Tags
Alternate Universe - Modern Setting Eventual Smut Angst with a Happy Ending Fake Marriage Spies & Secret Agents FBI Agent Rio Vidal FBI Agent Agatha Harkness slow burn sort of??
“Look, I don’t care about how we feel about each other in our personal lives, but during missions we are so disgustingly in love people would write movies about us, got it? You’re going to blow the whole mission.”Rio’s head jerked back at that. “I’m...
Alley Cat

Alley Cat

G
Updated
15.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Regulus Black/James Potter, Regulus Black, Sirius Black/Remus Lupin, a cat he found in the alley way, Mulciber Sr. (Mentioned)
Tags
Maybe - Freeform Spies & Secret Agents i think Modern Assassins Mentioned Sirius Black Mentioned James Potter this might become a full fic tbh I kind of like the premise if i do the tags will be updated Assassination Plot(s) James and Regulus are Partners in multiple senses of the term
In a city alleyway in the dead of night, there's a man, a cat, and a taste for either tuna or bloodshed. And Regulus Black is all out of Tuna.orJegulus Assassin / Spy AU??? (It's literally less than 500 words rn so that's all I've got atm <3)
Breaking the Walls

Breaking the Walls

Gen
M/M
Multi
G
Updated
15.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Marauders (Harry Potter), Sirius Black/Remus Lupin/Peter Pettigrew/James Potter
Tags
Enemies to Friends to Lovers Polyamory Espionage First Wizarding War with Voldemort (Harry Potter) Spies & Secret Agents Friends to Enemies Intrigue
Undercover

Undercover

F/F
F/M
M/M
G
Updated
15.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Regulus Black/James Potter, Regulus Black, Sirius Black/Remus Lupin, Remus Lupin, Sirius Black, James Potter, Peter Pettigrew, Marlene McKinnon, Dorcas Meadowes, Narcissa Black Malfoy, Marlene McKinnon/Dorcas Meadowes, Evan Rosier,
Tags
Alternate Universe - Modern Setting Knives Guns Fire Spies & Secret Agents no magic Secret Organizations Animagus Alternate Universe - Spies & Secret Agents french black brothers In a way Daggers
The Skittles are villains. The Marauders and Valkyries are heroes. Everyone is undercover. What could possibly go wrong?
Misdirection and Other Magics

Misdirection and Other Magics

Gen
G
Updated
15.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Harry Potter, Remus Lupin, Sirius Black, Severus Snape, Ron Weasley, Hermione Granger, Harry Potter & Severus Snape
Tags
Abusive Dursley Family (Harry Potter) Magically Powerful Harry Potter Spies & Secret Agents Misguided Albus Dumbledore Mentor Severus Snape Second Wizarding War with Voldemort (Harry Potter) Book 5: Harry Potter and the Order of the Phoenix Dudley Dursley Redemption past wolfstar - Freeform Severus Snape Adopts Harry Potter enemy to mentor eventually adopts that is
Harry's hand is still burning, and he is still cold, and he is unconscious but not tired. His memories warp and adjust with this new knowledge of an additional sense. Magic has a physical presence. Magic is living. The Summer after Year...
Traducción: "Code Name L" de GallaPlacidia

Traducción: "Code Name L" de GallaPlacidia

M/M
G
Updated
15.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Original Characters, Harry Potter, Draco Malfoy/Harry Potter, Draco Malfoy, Ron Weasley, Hermione Granger
Tags
Angst Angst with a Happy Ending Dubious Consent Harry Potter Epilogue What Epilogue | EWE Department of Mysteries (Harry Potter) Spies & Secret Agents Angustía Secrets Identities El Epílogo de Harry Potter No Existe Angustia con final feliz Dubious consent but not between Draco and Harry Harry is a bit of a dick
Los aprendices en el Departamento de Misterios se mantienen bajo un hechizo de identidad oculta durante dos años. Harry ni siquiera sabe de quién se ha estado enamorando todo este tiempo. Está nervioso por La Revelación, pero en realidad, ¿Qué es lo...
why not you.

why not you.

M/M
G
Updated
15.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Regulus Black, Remus Lupin, Sirius Black, James Potter, Peter Pettigrew, Lily Evans Potter, Minerva McGonagall, Narcissa Black Malfoy, Frank Longbottom, Alice Longbottom, Filius Flitwick, Xenophilius Lovegood,
Tags
Fluff Alternate Universe - Modern Setting Crack Fluff and Crack First Kiss Happy Ending Anxiety Attacks Strangers to Lovers i guess? Cute Spies & Secret Agents Alternate Universe - Non-Magical
Peter feels awfully bored these days. He works for The Order, an organisation that sends its spies all over the world. But he... is just a prop maker. He doesn't do all that exciting stuff.Good thing he's suddenly assignated to making sure Xenophiliu...
January's white nights

January's white nights

F/F
G
Updated
18.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Remus Lupin, Sirius Black, James Potter, Peter Pettigrew, Lily Evans Potter, Mary Macdonald (Harry Potter), Marlene McKinnon, Frank Longbottom, Pandora Lovegood, Pandora Lovegood/Lily Evans Potter
Tags
Fluff Alternate Universe - Modern Setting Alternate Universe - Canon Divergence First Meetings Strangers to Lovers Cute Assassins & Hitmen Spies & Secret Agents Coffee Shops Alternate Universe - No Powers anyway Coffee
"I'm going to need your help to run away. Can you help me?"Lily smiles. That person is funny, and Lily never met anyone alike before. "Yes."Lily Evans has to retrieve a folder to expose a corrupted politician during a mission, and she meets Ghost, a...
you, tell me.

you, tell me.

M/M
G
Updated
18.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Sirius Black/Remus Lupin, Remus Lupin, Sirius Black, Peter Pettigrew, Mary Macdonald (Harry Potter), Marlene McKinnon, Lily Evans
Tags
Alternate Universe - Modern Setting Blood Guns Blood and Violence Getting to Know Each Other First Meetings Gay Panic Assassins & Hitmen Spies & Secret Agents Alternate Universe - No Powers Remus Lupin Needs a Hug POV Sirius Black
"He looks like he can barely defend himself," Sirius says on the phone to Minerva, his mentor. "I don't need nobody.""He's our best element," she answers on the other side, and Sirius rolls his eyes.The first mission Remus Lupin and Sirius Black have...
so it's gonna be forever; or it's gonna go down in flames

so it's gonna be forever; or it's gonna go down in flames

M/M
Multi
G
Updated
18.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Regulus Black/James Potter, Regulus Black, Sirius Black/Remus Lupin, Remus Lupin, Sirius Black, James Potter, Peter Pettigrew, Lily Evans Potter, Mary Macdonald (Harry Potter), Marlene McKinnon, Dorcas Meadowes, Lucius Malfoy,
Tags
Angst Heavy Angst Violence Marauders Era (Harry Potter) Spies & Secret Agents Jegulus Regulus Black Needs a Hug like seriously minor marylily Mr & Mrs Smith AU no major death? But You Might Cry
“Pick up the gun, Reg.” Of all the things that Regulus Black had expected James Potter to pant to him, this was not one that had ever crossed his mind.“No.” He knew his voice sounded broken, but that’s kind of to be expected when your husband has a g...
The Moon Lights Up the Graveyard

The Moon Lights Up the Graveyard

G
Updated
18.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Regulus Black, Remus Lupin, Sirius Black, James Potter, Peter Pettigrew, Lily Evans Potter
Tags
Betrayal Grief/Mourning First Wizarding War with Voldemort (Harry Potter) Regulus Black & Sirius Black Have a Good Relationship Spies & Secret Agents Remus Lupin Needs a Hug Good Regulus Black Slytherin Sirius Black Protective Regulus Black well they had a good relationship
After James and Lily die from Peter's betrayal, Remus goes to the most unlikely place for help.
the enemy of my enemy

the enemy of my enemy

F/F
M/M
G
Updated
18.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Regulus Black/James Potter, Regulus Black, Sirius Black/Remus Lupin, Remus Lupin, Sirius Black, James Potter, Lily Evans Potter, Mary Macdonald (Harry Potter), Minerva McGonagall, Marlene McKinnon/Dorcas Meadowes, Albus Dumbledore, Evan Rosier,
Tags
Angst Hurt/Comfort Fluff and Angst I Wrote This Instead of Sleeping Banter Enemies to Lovers Marauders Era (Harry Potter) Everyone Is Gay Spies & Secret Agents Gay Regulus Black Everyone Is Alive Morally Grey Regulus Black
During the Cold war Russia and USA are forced to work together against Germany due to a nuclear threat. The close proximity forced upon agents Regulus Black and James Potter may lead to a blurring of lines between the two. Can two enemies that can't...
and we've both done it all (a hundred times before)

and we've both done it all (a hundred times before)

F/F
F/M
M/M
G
Updated
18.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Regulus Black, Sirius Black/Remus Lupin, James Potter/Lily Evans Potter, Remus Lupin, Sirius Black, James Potter, Peter Pettigrew, Albus Dumbledore, Evan Rosier, Lily Evans, Pandora Lovegood, Sirius Black & James Potter,
Tags
Marauders Era (Harry Potter) First Wizarding War with Voldemort (Harry Potter) Albus Dumbledore Bashing Spies & Secret Agents Horcrux Hunting no beta we die like voldemort more to be added - Freeform Evil Peter Pettigrew im sorry king ily but we need some corruption i have no idea whats going to happen in this wont lie
An eerie sense of déjà vu overcame Remus, as he recalled Sirius’ following the pattern of his scars with a featherlight touch, the very same pattern that Regulus' knife traced now across his neck. Remus met Regulus’ eyes and gulped loudly at the look...
Come Alone

Come Alone

F/M
G
Updated
18.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
James Potter/Lily Evans Potter, Remus Lupin, Sirius Black, James Potter, Lily Evans Potter, Mary Macdonald (Harry Potter), Alastor "Mad-Eye" Moody, Nymphadora Tonks
Tags
Angst with a Happy Ending Spies & Secret Agents Desi James Potter BAMF Lily Evans Potter Modern Marauders (Harry Potter) Wartime Romance Although I never really mention it Soldier James Potter Soldier Lily Evans
A year into the war, James got a letter."Come alone."The letter said.And he had. God help him, James had slipped out without telling Remus or Sirius where he was going. He’d left a note, but they weren’t supposed to find it until the morning. If they...
Of Stars and the Galaxies they Outshone

Of Stars and the Galaxies they Outshone

M/M
G
Updated
18.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Original Characters, Harry Potter, Ron Weasley, Hermione Granger, Tom Riddle, Zacharias Smith, Harry Potter/Tom Riddle, Theodore Nott, Hermione Granger & Harry Potter & Ron Weasley, Harry Potter/Original Male Character(s), Cormac McLaggen, Alecto Carrow,
Tags
Alternate Universe - Modern Setting Betrayal Guns Childhood Friends One Shot Spies & Secret Agents Alternate Universe - Non-Magical Alternate Universe - Childhood Friends Secret Organizations Smart Harry Potter Spy - Freeform Explosions
Harry and Tom grew up together in Wool's Orphanage until Tom... just... left. No note, no tearful goodbye, nada.It's been seven years since Tom's graduated Hogwarts, seven years since he made his debut into high society, seven weeks since Minister Fu...
the year of sugar, everywhere

the year of sugar, everywhere

F/F
G
Updated
13.04.2025
Fandom
Marvel Cinematic Universe
Characters
Tony Stark, Steve Rogers, Clint Barton, Sam Wilson, Yelena Belova, Yelena Belova/Natasha Romanov, Natasha Romanov
Tags
Spies & Secret Agents Christmas Fluff Cuddling Mistletoe Height Differences
Yelena is a product of the Red Room, still cleaving her own head open and taking out the parts that aren’t her. She isn’t stable. She’s a liability. A dangerous one. Natasha tucks her closer.