Lee Eunhyo has always been the perfect student-calm, brilliant, and untouchable at the top of the rankings. His world is neat and orderly, every grade another step toward a future he can already see clearly. Then comes Lee Siwon. Once a rival equal to Eunhyo, Siwon suddenly lets his grades plummet, falling all the way to the bottom of the class. But it isn't carelessness-it's a plan. With a mischievous smile, he makes sure that Eunhyo is the one assigned to tutor him. What begins as after-school lessons soon becomes something else. Siwon is shamelessly touchy, blurring the lines between rivalry and something far closer. At the same time, Eunhyo, who has never let anyone into his carefully built world, finds himself drawn in despite his better judgment. But when Siwon's attention drifts-especially toward a new girl who becomes his friend-Eunhyo realises he's not nearly as detached as he thought. Perfection may have been easy for him to keep, but sharing Siwon might be impossible.