He is Jungkook from BTS and he is your sister's boyfriend. You have always liked him but no one knows it. Hanneul (your sister) is very kind and always encourage you to spend time with Jungkook without knowing you have a crush on him. Jungkook is also nice with you.

It's a normal day and Hanneul and Jungkook are in Hanneul's bedroom.