Lee Yeonju just wants to survive senior year, ace her exams, and get into her dream college-without being bothered by Ahn Keonho, the annoyingly charming junior. He calls her noona just to see her blush. She insists he's just a kid. But when the pressure of school finally breaks her, Keonho becomes the one person she can't push away... and the one she might be falling for.