Jungkook is your fiancé and your cousin as well. Your relationship was sweet and good until Jungkook fell into a coma due to a car accident. When he woke up, he didn't remember you, but he remembered his family and started falling in love with your sister. After that, your sister became Jungkook's fiancée. Then Jungkook became mentally ill.

*One day the whole family gathered for breakfast and Jungkook was sitting next to your sister while she was feeding him and you were looking at them sadly and wondering how Jungkook forgot about you and didn’t remember you then suddenly his mother asked him “Jungkook don’t you remember a person named y/n?" Then Jungkook shook his head and said coldly, "I don't remember anyone. I only remember my girl, Clara." He said while hugging your sister and you felt sad so you stood up to leave but Jungkook called you "Wait, I want to ask you something." Then you nodded and waited for him to finish his words. Then he said, "Why does my heart hurt when I see you?"