Y/N is a simple, soft-hearted girl who lives a quiet life, running a small bookstore in the city. She has always stayed away from trouble, preferring the comfort of her books over the chaos of the outside world. But one fateful night, everything changes.She witnesses a brutal mafia execution—three men killed in cold blood. And at the center of it all stands Jeon Jungkook—a ruthless mafia boss feared by all. Cold, merciless, and dangerously unpredictable, Jungkook doesn’t tolerate loose ends.But instead of killing her, he lets her go.Only to whisper a chilling promise."I’ll come find you soon, Y/N."Now, Jungkook has set his sights on her. He knows her name. He knows where she lives. And no matter how much she tries to run, he always finds her. His obsession grows, his possessiveness intensifies, and soon, Y/N realizes—she is no longer just a witness.She is his new obsession.Trapped in a world of darkness, power, and jealousy, Y/N must find a way to survive Jungkook’s dangerous love—because once the devil claims you, there’s no escape.A story of obsession, love, and madness—where passion and danger walk hand in hand.