Underworld Fanfiction Crossover

Adams Martin does everything humanly possible to avoid people after surviving COVID-19 and suffering from PTSD. Following his therapist’s instructions, he adopts a dog from the shelter to help him navigate being around people. The only problem is, that his dog occasionally shifts from dog to man and back.   Kehan Gammy (Alex) is the embodied soul of the first Inugami, created by the gods. When he was sent to the human world as punishment for letting a powerful, dark soul escape into the human world, he didn’t expect to have to be bound to a human and have to blend in as one, learning everything like a baby and adapting to his new-found body. But Adams was easy to bond with, giving him a human name, Alex, he’d appeared as a common dog. When his exit from the underworld set off strange events happen in New York. He has to devise a plan that doesn’t involve Adams Martin in Will he be able to protect everything he wants to preserve or will he return with yet another failure?

No one crosses Dante Kincade and walks away unscathed. I just did it with a microphone and a song that made the entire room gasp. Marisol Franco has spent years hiding under a fake name, trying to outrun her father's brutal empire. But one impulsive karaoke performance at a corporate event shattered her cover and made her the target of her powerful CEO, Dante Kincade. Cold, calculating, and rumored to have ties to the underworld, he doesn't forgive public humiliation. Dante wants revenge and her secrets. But as his obsession grows, so does the dangerous desire neither of them can control. With her fire and fearlessness, she’s nothing like the women who try to please him. She meets him head-on and defies him at every turn. But her past is darker than he imagined. Hunted by her father’s men and promised to a sadistic cartel heir, she’s running out of time. Trapped between three dangerous men and a past that won’t stay buried, Marisol must decide who to trust before everything goes up in flames. Now, the only man standing between her and a fate worse than death is the one who has every reason to destroy her. Dangerous Melodies is a dark, addictive romance brimming with secrets, betrayal, and enemies-to-lovers heat. Perfect for fans of forbidden desire, dangerous obsession, and love that refuses to surrender.

" Where do you think you are going?!" A chilly and domineering voice rang out across the room, enough to make the atmosphere heavy. Ava froze as she was about to twist the door knob. "Shit!" She cursed under her breath and slowly turned to face the monster coming for her. " Have you forgotten what I told you?!" Lorenzo yanked her towards him and lifted her chin, allowing her dazzling dreamy eyes that were full of fears to bore into him. " You are trapped, Ava," he whispered slowly, as he gave her a killer look made to destroy hearts. ~ Known as the richest man in the city and one of the people who could dominate the country, Lorenzo was unmatched. A mafia boss....he was, and he ruled the underworld smoothly. All the people in the underworld knew just how cruel and cold he was. A word from him was enough to crumble them into nothing! Just how domineering?! Ava, on the other hand, was a feisty and rash young lady who had a very good charm. She was an actress and known to have a clean background, but all that turned upside down one day. Now, her buried secret was revealed, and if exposed to the outside world, it could ruin her. Threatened with it, she was forcefully given a mission that was almost impossible to accomplish. But she knew that was her only choice.....even though there was a great reluctance in her heart. Lorenzo, who had a hidden Identity, was the main target. A mafia boss and an actress with hidden goals..... But a game only needs a winner and a loser. Will all his sweet tortures to her finally turn into something addicting? Can it capture them and entangle them into something lovely?

Once a helpless girl, now the most feared assassin in the underworld—Sameera Ashar knows how to survive. But when she’s framed for the murder of billionaire Vaughn Steele’s wife, survival isn’t enough. She needs revenge. Vaughn should’ve known better than to trust the evidence. But blinded by fury, he hunts Sameera down, forcing her into a marriage built on deception and control. She’s his prisoner, his obsession… but never his victim. Yet, beneath the hatred, the stolen glances, and the war between dominance and defiance, desire sparks. The more Vaughn tries to tame her, the more she consumes him. And when the truth unravels, leaving them both exposed, he realizes too late—Sameera was never his to break. Now, with enemies closing in and a love as dangerous as the secrets between them, the hunter is about to become the prey.

Ava Carter is no stranger to danger. As a fearless investigative journalist, she’s built her career on uncovering secrets others would kill to keep buried. When a tip leads her to Damian Moretti—the elusive billionaire with whispered ties to the underworld—she knows she’s onto something big. Damian is powerful, ruthless, and used to controlling every aspect of his world. But when Ava starts prying into his business, she becomes a problem he can’t ignore. He gives her a warning—walk away, or face the consequences. Yet, the more he tries to push her away, the more drawn he is to the fire in her eyes, the defiance in her stance. Ava is determined to expose him. Damian is determined to keep his secrets. But in a city built on deception, neither of them is prepared for the dangerous attraction pulling them together. As enemies close in and the truth threatens to shatter everything, Ava must decide—will she bring Damian down, or will she risk everything to stand beside him? In Sincity, love is a gamble… and some bets can cost you everything!

She chased a rich man for revenge. She collided with a mafia king instead. Ophelia Barclay has spent her entire life playing by the rules of a family that never wanted her. Now, after a humiliating betrayal by her fiancé and stepsister days before her wedding, she’s done playing nice. Revenge is the only thing on her mind, and she knows exactly how she’ll get it: find a rich, powerful man who can elevate her beyond the Barclays’ reach, and leave them choking on the dust of her success. First-class flights become her hunting ground. But when she meets Ludwig Gallo, a man whose presence steals the very air from her lungs, her plans unravel before they even begin. He's everything she’s been looking for: dangerous, devastatingly handsome, and so wealthy it hurts to breathe near him. The problem? He doesn’t even glance her way. Humiliated and desperate, Ophelia thinks she’s lost everything… until fate throws her right into Ludwig’s world. Tracking a lost necklace, her most treasured possession, she finds herself sneaking into the heavily guarded Gallo estate, only to be captured by the mafia king himself. Mistaken for a spy, imprisoned in enemy territory, Ophelia’s survival instincts kick in. When Ludwig proposes a deal to pretend to be his girlfriend to silence rumours that have driven his mother into depression, Ophelia sees an opportunity. She’ll play the doting lover, smile for the cameras, win the favour of one of the most feared families in the underworld… and use Ludwig's wealth and power to destroy everyone who wronged her. But Ophelia didn’t plan on Ludwig being more than just a cold-blooded king. Beneath his ruthless exterior, she finds a man haunted by a violent past.

There’s a thin line between desperation and destiny ****** Sophia Jenkins has lived her life in the shadows of hardship. At 23, she juggles multiple jobs, trying to lift her family out of debt while caring for her terminally ill mother. Her only dream is to escape the weight of her broken home and rewrite her family’s fate. But fate had other plans. On her birthday, when relentless debt collectors humiliate her and her father, Sophia’s world shatters—until a mysterious man steps out of a sleek black car, commanding the chaos with nothing but his presence. Leonard Morano. At 40, Leonard is the ruthless head of the Morano mafia empire, a billionaire controlling over a hundred businesses and underground casinos. What no one knows is that he was once Martin Jenkins’ best friend—and the man who silently watched Sophia grow from afar before vanishing when she was fifteen. Now, he’s back. And he’s not offering help. He’s demanding marriage. With the chilling words, “Marry me, and I will smash every obstacle in your way,” Leo pulls her into a world of luxury, power, and deadly secrets. But can Sophia survive the dark underworld Leo rules? Can love truly bloom in the cracks of fear, obligation, and a past that refuses to stay buried?

Isabella’s Herrera’s world unravels when her father’s reckless dealings with the notorious mafia boss Lorenzo Castillo leave her family drowning in debt. With her younger brother’s life hanging by a thread, Bella is forced into a dangerous bargain: herself as payment for her father’s sins. Lorenzo Castillo is a ruthless and calculating man, hardened by the violent underworld he controls. Bound by a code of power and loyalty, he has no room for emotions—until Bella’s fiery spirit and unwavering determination begin to chip away at his cold exterior. As the contract between them deepens, so does the dangerous attraction that neither can ignore. But Bella’s past is riddled with secrets, and as she navigates the shadows of Lorenzo’s empire, she discovers that not everything is what it seems. A rival mafia leader, Gabriel Moretti, is hell-bent on taking over Lorenzo’s empire, and Bella becomes the key to his plot. With her life now at the mercy of two powerful men, Bella is caught between love, loyalty, and survival. In the world of betrayal and bloodshed, can a debt born from desperation ignite a passion that could either save or destroy them both? A Debt of Passion is a gripping tale of forbidden love, power, and redemption, where every choice comes with a deadly cost, and every heart is a battlefield.

Penelope Faelan’s life was ordinary, if not for her haunting beauty—an allure so striking it seemed almost otherworldly. But the life she knew vanishes the moment the goddess Demeter kidnaps her, desperate to save her daughter, Persephone, from a fate worse than death: becoming the Queen of the Underworld. Transformed into an exact replica of Persephone, Penelope is thrust into a world of darkness and deceit, forced to take her place as Hades’ queen. Bound by magic to conceal the truth, Penelope finds herself at the mercy of the brooding and enigmatic King of the Dead. But Hades is not the monster she was warned about. Beneath his cold exterior lies a smoldering intensity that stirs something Penelope has never felt before. As Penelope struggles to adapt to her new role, the Underworld reveals its secrets—and her own. With every passing day, she begins to question her past and the mysterious circumstances that led her to this moment. Meanwhile, Persephone watches from the shadows, determined to reclaim her throne and the man who was never meant to fall for her mortal double. As passions ignite and loyalties are tested, Penelope must navigate a labyrinth of lies, lust, and power. When Demeter’s betrayal sets a deadly plan into motion, Penelope faces an impossible choice: to fight for her freedom or embrace the darkness and claim her place as the true Queen of Shadows.

“I’m done with you, Aurora Fernandez—if that’s even your name.” Mia’s voice trembled with rage as she turned for the door. “You’ll regret refusing me,” Aurora snapped behind her. Mia's hand touched the knob—just as it turned on its own. The door creaked open. Her heart dropped. Standing in the doorway was a face she never wanted to see again. Lucius Lovato. The cold, merciless CEO of the department store where she'd once worked. His eyes swept over her with visible disdain. “Who is this little thing, Eva?” he asked, his voice hoarse and biting. And just like that, Mia knew—she was trapped again. Wrongfully accused. Publicly humiliated. Betrayed by the only man she ever loved. Mia Simpson thought she'd hit rock bottom. Then came the offer—escape prison and start over, under one terrifying condition: seduce and marry Lucius Lovato, the mafia heir with a heart of ice and a soul no one dares touch. But Mia isn’t the fragile girl the world thinks she is. She agrees to the deal—on her own terms. Behind her innocent eyes burns a thirst for revenge, and the deeper she steps into the dark world of power, blood, and secrets, the more dangerous she becomes. Lucius, however, is not a man easily fooled. Every attempt to break him only draws him closer. And every secret Mia hides? He already suspects. As enemies close in and her hidden past begins to unravel, Mia discovers a horrifying truth—she is not just a girl caught in the middle of a mafia war. She is the legacy of something much greater… and much more feared. He was her mission. She was his undoing. But in the underworld, love might just be the most dangerous weapon of all.