Cheolo Choi was the kind of boy people wrote love letters to and never sent. The hallway lit up when he smiled, the campus whispered when he passed, and everyone wanted to be near him - or be him. With his disheveled charm, untamed laughter, and a heart that danced to no one's rhythm but his own, he was the golden boy no one could resist. Everyone, except Yohan Jeo Yoon. Top of the class. Calm, composed, and almost impossible to read, Yohan was a straight line in a world full of curves. A master of formulas, a perfectionist with a planner, and the only one who never looked Cheolo's way. He lived in the library more than the sunlight, spoke in facts more than feelings, and never once tripped over the chaos of love. But Cheolo? He was already tangled. In the quiet glances. In the sharp wit. In the way Yohan existed so far from his world, yet occupied so much of his heart. This is a story about the boy who had everything - and the one thing he couldn't have. A story about straight lines that don't bend... and hearts that do.