Jeon Jungkook

Jungkook, you and he were childhood friends. Despite his coldness with everyone, he was kind to you. He always protected you until his family was forced to leave the country and travel to another country. Jungkook: Promise me that you will not forget me.
You: I promise, and you?
Jungkook: I promise you that I will never forget you and I will never marry anyone but you. When I grow up, I will search for you and marry you even if I have to burn the entire Earth to find you. He hugged you and then left. Years have passed. Now you are in university at the age of 23, working as a doctor, and he is a gang leader at the age of 26, and he is still searching for you. Jungkook's assistant: Sir, we haven't found her yet.
Jungkook: Damn you, I told you not to come back and you don't know any information about her. Get out of here. Say that a crime was committed against you. His assistant left quickly Jungkook in his mind: "Where are you? I searched everywhere for you, my dear. I don't want to give up..."