The Yu family built an empire on power, wealth, and perfectly calculated deals. Yu Karina is no exception-sharp, relentless, and always in control. To secure their inheritance, all she needs is one final piece to fall into place: Kim Duho's firstborn daughter agreeing to marry her brother. Winter, the ever-elusive heiress, is anything but easy to persuade. She sees through Karina's every move, meets her sharp wit with an even sharper tongue, and makes it painfully clear-she has no interest in being part of the Yu family's schemes. But Karina doesn't accept losses. She negotiates. Manipulates. Wins. And Winter is just another deal waiting to be closed. At least, that's what she tells herself. As secrets surface and time runs out, Karina finds herself caught in a dangerous game-one where the lines between manipulation and genuine desire begin to blur, and falling for Winter might cost her more than she's willing to give.

Winter Kim spent years idolizing Karina, believing that following in her footsteps would bring them closer. She transferred schools, joined Kwangya Entertainment, and stepped into Karina's world hoping to stand beside her. But admiration is a dangerous thing. To Karina, Winter wasn't a fan, she was a threat. She hated the way Winter followed her, how their mentors praised her, how she was suddenly everywhere. Yet no matter how much Karina tried to push her away, she couldn't ignore her. And as rivalry turns into tension, they begin to wonder, is it really hate, or something more?

Karina is a superstar who thrives on control, precision, and a flawless routine. But when her carefully curated world is flipped upside down after a last-minute cancellation, she's forced into a situation she swore she'd never tolerate-a partnership. Winter is everything Karina isn't: loud, unpredictable, and a constant source of irritation. From the moment they collide outside the CEO's office, it's clear Winter's sunshine personality is about to make Karina's life a living hell. With the biggest performance of the year on the line, Karina has no choice but to work with the chaos personified that is Winter. Sparks fly-on stage and behind the scenes-but are they sparks of passion or the first sign of disaster? 💔 Grumpy x Sunshine dynamic 🎤 K-pop stardom, tension, and unexpected chemistry ✨ A slow-burn romance set against the glitz of fame #1 - Winter #1- stage #2- My