Eun-ji was the girl who lived next door and younger sister of Jungkook's friend. When her older brother went off to college, Yoongi asked Jungkook to look over her. What he didn't know was she's had a major crush on him for as long as she can remember. Things started to get tricky when Jungkook got a letter from Eun-ji, confessing her feelings for him. Asking him to wait for her. He was 22, fresh off college and she was only 15, he just couldn't picture them together as lovers. Five years passed but her confession kept on taunting him. Is it too late to take the chance with her now? Does she still feel the same? Will she let him prove he's worthy of another chance?