She likes him. She clings to him, confesses her love... She tries every possible way, but he never responds. Time and again, he hurts her and misunderstands her. Heartbroken, she leaves.
He's grown used to having her cling to him every day, used to everything about her. She's all he can think about, and every expression and smile of hers is etched deep in his heart. Then he learns that he misunderstood her. Only afterward does he realize he's fallen in love with her.
A few years later, she returns. When they meet again, she's cold toward him, treating him like a stranger. And there's even a rival in love, so he has to fight fiercely for her.
Premise: Cherish the people by your side.