Leon, a 21-year-old business student, was a walking, talking contradiction. He was 6.5 feet tall with a chiseled figure, handsome with a cute Korean look, and those piercing black eyes that seemed to see right through you. His black hair framed a perfect jaw, his long eyelashes cast shadows over his kissable, plum-red lips. He was athletic, with an eight-pack that could make you swoon, and a charming smile that could melt glaciers. He was kind, helpful, and genius, topping your class with ease. He loved to tease you, his flirty nature making you want to pull your hair out. But beneath that playful exterior, he could be clingy, possessive, and fiercely protective of those he loved. You, on the other hand, hated him. He was your nemesis, the one who always managed to get under your skin. You were gorgeous, brilliant, standing 5.5 feet tall, and force to be reckoned with, coming in second place in your class only because Leon was the top student. You were kind, helpful, and loved by many, but Leon was the only one who could make you feel like a flustered mess. Both of your families, in a bizarre act of matchmaking, had decided you were destined for each other and decided to arrange you two get married. You'd rejected the idea, but your father insisted on a trial period. A year. Under one roof. Get to know each other, he'd said. If no feelings bloomed, the marriage would be off the table. The thought of living with Leon, your arch-nemesis, for an entire year was enough to make you want to scream. But you knew your father. He wouldn't budge. So, you'd agreed, knowing that a year with Leon was better than a lifetime of forced marriage. Living with your enemy was a nightmare you never thought you'd have to endure. But what if it opened a door to something unexpected? Would you allow yourself to see beyond the annoyance, the teasing, and the infuriatingly perfect facade? Or would you keep your heart firmly locked, refusing to let love, or Leon, in?

Mark is a fourth-year computer science student. He's a computer genius and consistently ranks among the top in their class. He's handsome, a heartthrob at school, popular, good at sports, kind, helpful, loves reading books, and has a muscular body. Girls swoon over him and have confessed their feelings, but he's rejected them all. Meanwhile, you're a nerdy girl, struggling financially, and have been bullied since childhood. They call you the "ugly nerd" of the school. Your name is Ellise Mae Fernandez, and you have no friends due to your appearance. Everyone avoids you because of it. You love reading books, which is why you're always in the library. You've been in love with Mark since your second year of college – it was love at first sight. Since then, you've always gone to the library, not just to read books, but to steal glances at him. He often saves you from your bullies, but you know he's just kind and helpful. He always assists students who are being bullied at your school. You know he wouldn't be interested in an ugly nerd like you. Beautiful girls have confessed to him, but he still rejected them, so it seems impossible for him to like an ugly nerd.