"Its clear as day I married the wrong sister" - He married one sister for business. But he gave his heart to the other. To fulfill his dying father's final wish, Jeonghan gave up his reckless ways and entered a marriage built on duty...not love. His wife was kind, beautiful, and everything he should have wanted. But he didn't. Not until she introduced him to her younger sister. From the moment he met her, something shifted. The girl with quiet eyes and an untouchable soul awakened something real, something dangerous. He started treating her differently. Better. And the lines between loyalty and longing began to blur. Now two sisters are torn between love and blood. One holds his name. The other holds his heart. And Y/n knows it's wrong loving a man who should never have been hers. But the heart never asks for permission.

"I can't seem to forget you from that night" - She never meant to be there. He never meant to fall so fast. Dragged to a club against her will, a shy university student finds herself completely out of her element-until a chance encounter with a mysterious stranger leads to a night she'll never forget. He offers her safety, a ride home... and something far more unexpected: comfort, connection, and the kind of chemistry she's never felt before. She thought it was a one-time mistake. He knew it was the beginning of something real. When she discovers he has ties to her university-and worse, that he wasn't exactly single that night-guilt threatens to drown everything they shared. But he refuses to let her slip away, determined to prove he's more than his past. As fate pushes them closer through work, school, and unshakable desire, walls begin to crumble, and so do her doubts.

"there's a kiss scene on stage aswell..." "I can teach you" - She's a culinary student with zero acting experience-and even less experience with kissing. So when she's volunteered to play the princess in the school play just because she's "pretty," she's already out of her depth. But the real panic sets in when she learns her role requires a kiss. A real one. In front of everyone. She's never been kissed before. Not once. Enter her brother's best friend-the guy she's secretly crushed on for years. Confident, charming, and completely off-limits. He offers to help her practice, just enough to get her through the scene. One kiss. No feelings. No strings. But practice turns into something more. One kiss leads to another, and before they know it, they're spending stolen nights together and hiding glances in crowded hallways. The chemistry is undeniable. The risk? Even bigger. Because if her brother finds out, it won't just be her heart on the line-it could ruin everything.

"I knew it was you all along, Kim Yn" - She's always been the forgotten twin-the quiet one, the spare, the shadow trailing behind a sister who dazzles. While her family fawns over her sister's spotlight, she finds comfort only in her grandmother's unwavering love. But when her grandmother is placed on life support and hospital bills mount, everything begins to unravel. Her father's business is failing. Her sister, a social media star, is engaged to a wealthy CEO in a loveless arrangement meant to save them all. But when the sister realizes her fiancé is only kind when she's not herself, she starts sending in a substitute-her twin. Pretending to be someone else was never supposed to be anything more than survival. But the more time he spends with the wrong twin, the more he feels... right. And when he discovers the truth behind the switch, he doesn't walk away. Because maybe, just maybe, he never loved the image everyone else adored. Maybe he loved the girl who was never seen.

"I'll eliminate anyone who touches you" - He ran from blood. She ran from pain. Together, they found something like home...until the world tore them apart. As a child, he escaped the horrors of his father's criminal empire haunted by the bodies, the fear, the silence. Alone on the streets, he was found by her. A girl who had run from her own nightmare: an abusive orphanage that taught her survival, not love. She took him in, protected him, and worked like an older sister to give him the life she never had. But he never saw her as a sister. She was his light, his world, his only reason to believe in good. When she discovered his true identity that he was a missing heir to a powerful family, she made the hardest choice of all. She sent him back. And he hated her for it. Ten years later, he's no longer the sweet boy she raised. He's become cold, calculated, and terrifying just like the father he once feared. And when fate throws them together again in the blood-soaked aftermath of her abuser's death, the past comes rushing back. She sees the same eyes. The same boy. But now... he's a killer. And the boy who once clung to her as a savior now clings to a love she never expected one that blurs the lines between what they were and what they could be. He'd do anything for her. Protect her. Love her. Even if it means dragging her into his darkness.