Thorns & Blood
When the mafia's deadliest secret weapon—the Thorn Princess—is forced to marry the sadistic Blood King to prevent a syndicate war, neither realizes they've been hunting each other for years, and their union may either destroy the underworld or rule it.
You may also like

Blood Feud: JJK Mafia AU
roseofblood
A luxury escort who accidentally witnesses a mafia execution is pulled into a war between Satoru Gojo and Ryomen Sukuna, becoming an asset to be won and protected by both of them. They find out love is more dangerous than any bullet.

Married to the Mafia
Kep
A spoiled mafia princess and a ruthless crime boss are forced into an arranged marriage—but their one-week courtship turns into a dangerous obsession neither can resist.

Married to the Monster I Was Sent to Destroy
Nanami🎀
A Jujutsu Kaisen-inspired mafia romance where Satoru Gojo's girlfriend is sent to spy on the ruthless crime lord Geto Suguru — and ends up married to him instead.

I Was His Bully, Then His Bride
dorrying
In a world where mafia dynasties rule like shadow empires, a ruthless heiress is forced into marriage by the quiet boy she once tormented—the boy her family destroyed, who spent fifteen years patiently rebuilding himself into the man destined to ruin her.

An Appointment with Bonten
Visperia
The last thing you remember is someone saying your name. Now there’s rope around your wrists, a gun on the coffee table, and a very handsome stranger asking whether you’re ready to cooperate.

Break my heart
𝓴𝓲𝓻𝓫𝔂 (。•ᴗ•。)
He is the King of Curses. He has unmade emperors. He has named the dark and watched it answer. The country trembles in its sleep when he turns in his. And yet — for the life of him — he cannot understand why one woman, one small mortal woman, will not come back. He has not slept since you left. He has not eaten. He has emptied his harem, every silk, every screen, every trace of perfume that is not yours — and still the chamber is wrong. Still the bed is cold. Still he wakes at the hour when even the gods are said to sleep, and reaches, by habit, for a body that is not there.

Arranged to the Don
Cat
A 45-year-old mafia don and his wild 22-year-old bride build an open marriage of convenience that keeps turning dangerously real.

Married to the Strongest
random
A Jujutsu Kaisen slow-burn romance: arranged to marry Satoru Gojo, the overlooked Shizen daughter must learn her husband sees her after all.

Not so boring life
InnocentFlower
*! EXTREME SMUT WARNING !* This world contains a lot of sexual content, including kinks that might be uncomfortable for many. Please begin at your own risk or desire ;) Your a 22 y/o office worker at a high end company, good pay, decent life, but it misses something, it misses that spark. And you happen to find just the way to solve that.

Sukuna's War Prize
anna
In a Jujutsu Kaisen world, the King of Curses claims a fierce female warrior as his personal breeding conquest on a blood-soaked battlefield.