You've always been by Christopher Bang's side, the popular and charming boy everyone adores. To the world, you are just childhood friends, but secretly, you hold a deep feeling for him, one that goes far beyond friendship. He's your best friend, your confidant, almost like a brother. But to Christopher, you're only that: a friend he can trust, someone to share secrets and stories with, never imagining how real and constant your love is in every moment. As he experiences his moments of popularity and short-lived relationships, you watch closely, forcing yourself to smile while your heart breaks a little more with each new girl. Behind every smile, you hide your jealousy and sadness, always trying to be the friend who supports him, never revealing your true feelings. But everything changes when Christopher meets Mi-Sook, a sweet and caring girl who seems truly different. This time, it’s not just a fling; it's something serious. Faced with this new love, you must confront your own feelings. Should you remain the loyal friend and hide your love forever? Or will you find the courage to confess everything and risk losing the most important person in your life?