Which Dark Fantasy Romance Books Have Anime Adaptations?

Eros, the crown prince of the vampire kingdom, has always known that to reach his full maturity, he would need his promised feeding mate. But when he’s accused of brutal murders, he finds himself cornered by his father’s decree: to marry a sharp-tongued hybrid who fears neither his wrath nor the darkness that surrounds him — and who refuses to submit. With no other choice, Eros accepts Nina, the red-feathered fae, as his wife and future queen — a union Nina is determined to undo as soon as she can. But fate is cruel. Nina’s untamed spirit challenges Eros at every turn, awakening in him a raw, consuming obsession. Desire becomes uncontrollable, and before he realizes it, he marks her as his own. Now, running away is no longer an option.

Elina thought she had hit rock bottom. She lost her job. Her therapy session dredged up memories of the ex-boyfriend who stalked and traumatized her. The only thing she had left to look forward to was the finale of her favorite fantasy series, Moonbound Faith. Then the show ended. The heroes won. The villain died. Everyone got their happily-ever-after. That same night, a knock at her door shatters what little peace she has left. Her ex is standing outside. The man who was supposed to be in prison. Forced to flee into a storm, Elina runs until she reaches the edge of a cliff with nowhere left to go. Faced with a choice between death and returning to the man who destroyed her life, she jumps. But instead of dying, she wakes up inside Moonbound Faith. Not as the heroine. Not as a side character. But as Luna—the infamous villainess whose tragic death she celebrated only hours before. Determined to survive, Elina plans to use her knowledge of the story to change her fate. But everything she thought she knew begins to unravel when a small boy tugs on her sleeve and calls her one word: “Mom.” The original story never mentioned a child. And when Elina uncovers the truth behind his existence, she realizes something terrifying. The villainess was never the villain. The story lied. And the ending she remembers may not be the ending waiting for her at all.

The Demon King’s Bride The entire kingdom fears him. With white hair, piercing blue eyes, and a heart sealed by cruelty, King Edrion is known as the Demon King—a ruler who accepts betrothed brides… only to turn them into concubines and discard them without mercy. When a young noble lady is promised to the king, her fate seems sealed. But she refuses to give up her freedom—or the man she secretly loves: a guard from her own household. Desperate, they devise an unthinkable plan—to have a poor girl, identical to the noble, take her place as the royal bride. The girl agrees to assume a life that is not hers, believing she will become nothing more than another forgotten concubine in the shadow of the throne. What no one expected… is that the king would choose her. Now destined to become queen to the most feared man in the kingdom, trapped in a lie that could cost her life, she must survive the court, a forbidden desire, and a king who was never meant to look at her the way he does. Because the Demon King does not love. But when he chooses… he neither forgives nor lets go.

Clara lives a depressing life full of bullying and when she dies, she vows revenge on those who caused her death. A demon answers her call and offers her revenge. Clara accepts and is reborn into the body of an heiress. Together she and the demon set about getting revenge. Over time secrets are unveiled and feelings are revealed and Clara's second life becomes less about revenge and more about love.

Serra is a normal senior high school student who works really hard every night and weekend to pay off her parents' debts from loan sharks. But when she couldn't keep up with payments anymore, she decided to end her life. Surprisingly, she woke up in a different light-- in another world. What's more shocking was when she is addressed by one of the people as the demon king's bride.

A warlord with fire in his veins. A captive princess with nothing left to lose. When the Dragon Warlord seizes her crumbling kingdom, Sera expects death—not a collar of gold and a vow of possession. Claimed as tribute, she is taken to the heart of the mountain, where fire breathes and ancient magic sleeps beneath the stone. Rhazien is ruthless, monstrous, and terrifyingly divine. But he is also bound by something older than war: the need to claim. To protect. To own. Sera refuses to break. But as power shifts and passion ignites, she learns that dragons don’t ask. They take. And this warlord doesn’t just want her obedience—he wants her heart. And if she gives it to him, she may never survive the fall. The Dragon Warlord’s Bride is a dark fantasy romance full of possession, power struggles, and slow-burn heat. Perfect for fans of monster lovers, mating bonds, and morally unhinged kings who’d burn the world for their queen.