Yoo Nari, a dedicated high school senior preparing for her medical entrance exam, never expected to fall in love at first sight. But the moment she saw Lee Seowon—a tall, introverted college sophomore with a cold yet innocent charm—her heart skipped a beat. Though he barely acknowledged her at first, fate kept bringing them together. Nari tried to befriend him, but Seowon remained distant and unreadable. However, after an unexpected incident changes everything, his walls begin to crumble. She fell first, but he fell harder.