Blackcest (Harry Potter) FanFiction

Come With Me

Come With Me

G
Updated
15.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Regulus Black/James Potter, Sirius Black/Remus Lupin, Regulus Black/Remus Lupin, Sirius Black/James Potter, Remus Lupin/James Potter, Regulus Black/Sirius Black, Regulus Black/Sirius Black/Remus Lupin/James Potter
Tags
Past Child Abuse Implied/Referenced Rape/Non-con Dead Dove: Do Not Eat Past Sexual Abuse Author Is Sleep Deprived The Author Regrets Nothing Regulus Black Needs a Hug Desi James Potter Regulus Black Deserves Better Pirates Alternate Universe - Pirate Sirius Black Needs a Hug
He's already going to hell, and as long as Sirius doesn't stop him, he's going to drag all three of these men with him.----Pirate harem Au for Sirius/Regulus/James/Remus with zero slow burn, it's all whirlwind romance and porn with very little plot b...
Invisible String

Invisible String

F/M
M/M
Multi
G
Updated
15.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Regulus Black, Remus Lupin, Sirius Black, James Potter, Marlene McKinnon, Dorcas Meadowes, Evan Rosier, Barty Crouch Jr., Barty Crouch Jr./Evan Rosier, Pandora Rosier, Poppy Pomfrey, Barty Crouch Jr./Evan Rosier/Pandora Rosier (eventually),
Tags
No Beta Twincest Chaotic Barty Crouch Jr. rosier twins Title from a Taylor Swift Song Blackcest (Harry Potter) Barty Crouch Jr. is a little clueless
The Rosier twins get sick when they're separated for too long.Fuck JKR, I don't own the characters or the title.
Regulus black and the Halloween obsession

Regulus black and the Halloween obsession

M/M
G
Updated
15.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Regulus Black/James Potter, Regulus Black, Remus Lupin, Sirius Black, James Potter, Peter Pettigrew, Lily Evans Potter, Sirius Black/James Potter, Regulus Black/Sirius Black, Regulus Black/Sirius Black/James Potter
Tags
Porn With Plot Incest Explicit Sexual Content Dead Dove: Do Not Eat Alpha/Beta/Omega Dynamics Alternate Universe - Soulmates Alpha James Potter Alpha Sirius Black POV Sirius Black Top James Potter Bottom Regulus Black Top Sirius Black
"Yes! Well, I have been watching them, and it seems like children like ourselves—" he points at himself and then at him. "go to people's houses, they knock, and then adults open the door and give them candy!" Regulus explains his hands moving around...
fear

fear

M/M
G
Updated
15.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Regulus Black, Sirius Black, Background & Cameo Characters, Regulus Black/Sirius Black
Tags
Fluff and Angst Boggarts (Harry Potter) Riddikulus | Boggart-Banishing Spell (Harry Potter) Blackcest (Harry Potter)
Placed after The Prank™️Sirius feels he is going to end up like what his parents want. With that fear, he faces a boggart and he see’s himself. Except, he’s different.
The Orphan Twins - Part One

The Orphan Twins - Part One

G
Updated
17.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Harry Potter, Severus Snape, Draco Malfoy, Ron Weasley, Hermione Granger, Ginny Weasley, Tom Riddle | Voldemort, Fred Weasley, George Weasley, Albus Dumbledore, Blaise Zabini, Theodore Nott,
Tags
Albus Dumbledore Bashing Slytherin Harry Potter Weasley Family Bashing (Harry Potter) Slytherin Hermione Granger POV Hermione Granger Gay Harry Potter Lesbian Hermione Granger Hermione Granger is a Member of the House of Black Wool's Orphanage (Harry Potter) Hermione Granger & Harry Potter are Siblings Blackcest (Harry Potter) Pureblood Tom Riddle
On August 31st, only a couple of weeks before Hermione's fourth birthday, a new kid arrives at the orphanage she lives in. His name is Harry Potter. Harry, after spending 22 months with his Aunt Petunia and Uncle Vernon, was dropped off at Wool's Orp...
Purest blood

Purest blood

F/F
G
Updated
18.04.2025
Fandom
Harry Potter - J. K. Rowling Once Upon a Time (TV)
Characters
Evil Queen | Regina Mills/Emma Swan, Evil Queen | Regina Mills & Henry Mills, Henry Mills & Emma Swan, Evil Queen | Regina Mills & Wicked Witch of the West | Zelena, Lily | Lilith Page & Maleficent, Hermione Granger/Bellatrix Black Lestrange/Narcissa Black Malfoy, Lily | Lilith Page & Wicked Witch of the West | Zelena, Maleficent & Emma Swan, Minerva McGonagall/Maleficent, Ursula the sea witch/Fleur Delecor
Tags
Family Bonding Mother-Daughter Relationship Sister-Sister Relationship Protective Minerva McGonagall Mother-Son Relationship Blackcest (Harry Potter) Minerva sees Hermione as a daughter
Emma and Lily are both Maleficent's kids but they are triplets when they were thrown threw the portal, the egg hatched and one sibling was pulled from the egg and thrown threw time landing in England years after her sisters she ends up growing up you...
The Things We Couldn't Share (And Still Did)

The Things We Couldn't Share (And Still Did)

M/M
G
Updated
18.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Regulus Black, Sirius Black, Regulus Black/Sirius Black
Tags
Loss of Virginity Incest Possessive Behavior Underage Sex - Freeform Sibling Incest Virginity Brother/Brother Incest Blackcest (Harry Potter)
Regulus gives Sirius, his beloved brother, a gift.His virginity if you skipped the tags.
The Dark Heiress

The Dark Heiress

F/F
F/M
Multi
G
Updated
19.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Harry Potter, Draco Malfoy, Hermione Granger, Lucius Malfoy, Tom Riddle | Voldemort, Narcissa Black Malfoy, Voldemort (Harry Potter), Andromeda Black Tonks, Bellatrix Black Lestrange, Hermione Granger/Bellatrix Black Lestrange, Fleur Delacour/Hermione Granger, Hermione Granger/Narcissa Black Malfoy,
Tags
Albus Dumbledore Bashing Ron Weasley Bashing Bad Hermione Granger Hermione Granger & Draco Malfoy Friendship Good Friend Draco Malfoy Bellatrix Black Lestrange Is Hermione Granger's Parent Evil Hermione Granger Blackcest (Harry Potter) all the usual tags Hermione Granger Is A Player Hermione Granger was Raised by the Malfoys
After her father disappears and Dumbledore captures her mother, Hermione is taken in by the Malfoys. She grows up getting verbal abuse from Lucius and everything she asks for from her Aunt Cissy... But she never gets the only things she truly wants....