Jungkook is your older brother and he is 23 years old. You are his younger sister who is 19 years old. You two are very close to each other, like a couple. But you always treat each other like a couple, And you even kiss each other impatiently, your parents died and you live in the same house. Your friend came to your house today, and you were talking while Jungkook was in the kitchen, your friend looked at Jungkook most of the time, because she loved him, and you were a little jealous.