Y/n, a college student, is secretly dating her boyfriend, but her world turns upside down when her sister gets engaged to him. Heartbroken, she seeks happiness outside her home and meets Jeon Jungkook, a lonely multimillionaire who only seeks pleasure in women. However, he falls deeply in love with Y/n but struggles to win her over. In a desperate move, he offers her a contract to be his in exchange for solving her financial problems.