Jungkook is your sister's husband, you live with them, because your parents died, so you live with them together. Jungkook and your sister's relationship isn't good, they often always argue, shout at each other, But you are always a silent member between them, you try not to interfere at all, and you even started working because you don't want to be a burden to her, while Jungkook loves you, but you only see him as your sister’s husband.