Underworld Fanfiction Crossover

"You were never meant to be mine... but now that I have you, I'll destroy the world before I let you go." Amara Voss only wanted a quiet life, one far away from the brutal underworld that tore her family apart. But fate has other plans when she crosses paths with Dante Moretti, the ruthless and dangerously seductive kingpin of the Italian Mafia. He claims her. He marks her. He obsesses over her. What begins as a debt her father owes becomes an obsession neither of them can control. Trapped in a golden cage of diamonds, secrets, and blood, Amara fights for freedom. But can she survive Dante's dark world... or will she fall deeper into the arms of a man who would kill for her? Because when a Mafia King is obsessed, there’s no escape.

Catherine, a young, adventurous lady who possesses purple eyes and white blonde hair, is tagged as a witch by her society. This, she fears, will be executed by her society if she doesn't get a suitor in the next two months. Coincidentally, she meets a guy called Noah. They both made a bet to one another if Catherine can unravel the Moonlight in the werewolf kingdom, Painting it for him as he was so much obbessed. Unknown to both, fate has something else installed. Ethan, on the other hand, who is the beta of the Uranus pack, searches the whole kingdom, yet he is unable to find his mate. Catherine finds a necklace in her mother's room, and immediately she wears it. Her once-hidden connection to the werewolves is rekindled. Catherine is also known as Serena in the underworld kingdom, and she is Ethan's mate. The same Catherine makes a vow to Noah to marry him. Who would she choose? Noah or Ethan .? Let's find out in the book, "Bound by Moonlight."

“Shut your fucking damn mouth!” Zach’s voice echoed through the room, raw and sharp with anger. Madison didn’t flinch. If anything, the fire in her eyes only burned brighter. She had been pushing his buttons for days—emotionally, mentally. And it tore at him, deep down where no one could see. “I thought you liked it open,” she said with a wicked smirk, sauntering toward his desk like she owned the place. His body betrayed him, twitching at her dirty words. Of course she knew exactly what to say. She always did. “I’m not quitting!” she snapped. “I am a doctor. A damn good one. Who do you think you are to tell me to give that up?!” Zach rose from behind his desk, calm yet dangerous. His hands moved to open his suit jacket, revealing that familiar tension in his shoulders—the one that made her heart race. “Wha—what are you doing?” He closed the space between them in two strides. “I’m your Daddy,” he growled, low and close, “like you cried out last night. And you… you’re mine.” And then his lips crashed into hers before she could breathe another word. ~~ Darly Madison—respected surgeon, focused, disciplined, and just a little stubborn—had her world under control. That is, until her best friend dragged her to a luxurious night party at one of the city’s most exclusive hotels. One night. One mistake. One man who turned her world upside down. Zach Westley. Mafia boss. Dominant. Dangerous. Possessive to the core. She thought it was just a one-night stand. He had other plans. Now her life as a surgeon collides with a dark underworld she never saw coming. And whether she likes it or not… she’s been claimed by the Mafia.

Thunder's only sibling Lightning was found dead inside a secluded bar where he was believed to be last seen with Rufius, a mafia leader and one of the ruthless businessmen in the underworld organization. Puzzled on why his brother was entangled with such a man, he swore in his grave to avenge his untimely and brutal death. He starts digging on Rufius’s background, searching for links to give him a clearer path for his revenge with a help from a total stranger. There he discovered Rufius’ twin sister Rain, who was the total opposite of Rufius in every aspect. Thunder formed an unfair plan against her, by using her and have access to her brother’s life. He did everything for her to fall for him. But in the process of his pretend relationship with Rain, Thunder fell head over heels in love with her. Rufius did everything in his power to tear the relationship apart, even ordering his men to dispatch Thunder. But they failed to accomplish the task, so he uses his connections and quickly arranges a marriage for her. Thunder was helpless and almost gave up his love until he discovered who he really was and the truth about his real identity was revealed. Thunder appeared at Rain’s wedding day as the legitimate and only son of the most powerful mafia lord of their generation. He did not only regain the woman he fell in love with, but also avenged his brother’s death the minute Rufius got killed during their massive shoot outs. He became the most respected mafia lord not only to his subordinates, but to every mafia clan there is. He was known as the only mafia lord who possesses a fearless yet a heart made of pure gold.

After the death of her mother, Sienna Vale is taken in by her powerful, secretive stepfather and placed under the “protection” of his three mafia sons. But what begins as guardianship turns into something darker—and far more tempting. As Sienna uncovers secrets about her past, her parentage, and the brutal world she now lives in, she finds herself falling deeper into a web of desire, danger, and forbidden love. The brothers were never meant to want her—but they do. And someone wants her dead. Each act raises the stakes: Act I: Seduction begins. One of the brothers might betray her. Someone wants her gone. Act II: She’s trained to survive—body and mind. Romance deepens. Rival mafias close in. Act III: War explodes. Sienna becomes the queen of their underworld—but must choose between love and legacy.

“One life saved. One soul claimed.” “You belong to me now, little bird. You saved my life, and now I will spend mine claiming yours.” Cardiovascular nurse Ava Moreles thought saving a dying stranger was just another day at the hospital. She had no idea that pulling Dario Santos back from death’s door would seal her own fate. Dario Santos doesn’t just rule the underworld—he owns it. And now, he’s decided he owns her too. When he crashes her wedding with blood on his hands and possession in his eyes, Ava realizes the man she saved isn’t just dangerous—he’s obsessed. With her. Torn between the safe love she’s always known and the consuming fire of a man who would burn the world down for her, Ava must navigate a treacherous path where every choice could be her last. In Dario’s dark empire, love isn’t just dangerous—it’s deadly. But as the line between captive and willing participant begins to blur, Ava discovers the most terrifying truth of all: the monster she’s supposed to fear might be the only one who truly sees her soul. Will she surrender to the darkness that calls to her? Or will fighting for her freedom cost more than she’s willing to pay? Some obsessions are worth dying for. Others are worth killing for.

She is off-limits. Pure as snow. Too good for Hades to claim. The stoic new COO of Hunter Industries was Will Hunter's right hand man and best friend. His sister isn't for Harmon to have. Eight years his junior. The life of any party. He would do anything to protect her smile. He fulfilled all her wishes… Except her persistent requests for him to fuck her. He would never cross that line. One too many drinks brings about a moment of weakness. Four years of restraint shatters and he finally succumbs to his secret desire for her. They fuck until dawn. Harmon plans to escape on a business trip to Cupid’s Cove, Will's private island. He hopes a month away will cool the mutual fire their one night stand awakened. But Olivia won't be deterred. After her decade long crush finally fucked her senseless, she wants more. She follows him to paradise, determined to make him fuck her again. What she doesn't know is Harmon is a dangerous man, hiding a past filled with sinister secrets and lethal, psychotic killers. One reckless mistake in her pursuit of him sees Harmon facing off with a deadly assassin. Stuck in the middle, Olivia has no choice but to entrust her safety to him. Forced to stay by her side, they get up close and personal. Day and night. Her questions are many. His willingness to answer is nonexistent. The mission: keep her alive until he can send her home. The problem: they are in paradise, surrounded by cutthroat enemies with scores to settle and hidden agendas. The shadows of the underworld are the least of his problems. How long can he keep her in the dark when all he wants to do is fuck the fear out of her eyes?

Antonio 'Tony' Santa De Leones. The CIA's black sheep. Foul mouthed. Rude. Known for his penchant for pretty little things. A weakness, they said. But Tony beg to differ. Suspended and very bitter. He flies to Italy. Spends one night drowning his regrets in the arms of a beautiful stranger. A man. A mistake? No. Not a mistake. Then, Tony's past comes knocking. His real past. The CIA found out, that he came from a long line of Mafia royalty. Also a black sheep to that family. The CIA wants him to go undercover in the very mafia he was born into—the family that disowned him. The legacy he buried. And their bait? Reinstate his rank. Reclaim his pride. And what will he get in turn? A chance to burn his bloodline from the inside. But nothing could prepare him for what he finds out. The mysterious one night stand? His name was Angel. The prized possession of a rival mafia leader. And the key to everything. Tony should just act. Use Angel how he see fit. Then discard him. But he's already addicted. Obsessed. And in the criminal underworld where loyalty is a lie and love is a weakness? Obsession can be deadly.

David Smith was a man both feared and respected. In the underworld, he held the highest position, leading the most powerful organization. His influence was vast, and his wealth immeasurable. Yet, David chose to abandon it all, tired of a life filled with constant danger. He wanted a fresh start, a peaceful life. For certain reasons, he married Luna George, a daughter of the esteemed George family. However, his presence in the family was met with scorn, as they saw him as a poor man with nothing to his name. Will David reveal his true identity? Will he return to the underworld and reclaim his throne?

WARNING: MATURED CONTENTS. "What.. what do you want?" Regina asked, moving backwards calculatingly from the predator whose eyes scanned her length like she was a prey about to be devoured completely. She kept stepping back but he grabbed her arms and yanked her over. "You're my wife and I have all the right to do whatever I want with you!" Daniel whispered harshly. He grasped her wrist, pulling her over to him. He swirled her around then he pushed her down on the bed. She gasped as her dress went up her thighs due to how hard he pushed her and pinned her hands above her head. Regina could only tear up when he hovered over her with his gaze dark and his face blank. What did she do to deserve such an ill-fated life? ----- The two stone-hearted brothers. One was a cold-hearted CEO who was aloof to everyone, involving his contracted wife, Regina, who became his prisoner as he made life miserable for her even after killing her father and uncle. And the other was a cold-blooded murderer and king of the underworld as they called him. He was known to be a stone hearted Mafia and the king of the assassins who abducted the innocent and cheerful Rachael just after killing her father before her eyes. He took her hostage as his slave and made her wish for death every single day. But what would happen when the two notorious brothers fall in love? Will the women they caused endless pain reciprocate their feelings or seek revenge for their loved ones that were brutally murdered by these two men?