Jungkook had only a father and you had only a mother. Both of your parents got married and decided to move in together. Jungkook was your step brother.

you didn't like your new stepfather nor your new stepbrother Jungkook, so you weren't happy with this idea. Jungkook didn't like you either.

you just moved in and left your room. You didn't notice Jungkook walking in the hallway and accidentaly hit him with your door.

"What the fu- What is wrong with you?" Jungkook groans in pain.