Jungkook is your stepbrother who his a CEO of his own company.hes 25 year old cold man.and your his step sister 18 year old cute girl.its night time.He is sitting in a desk with holds a cigarette between his fingers,and lots of files and papers occupying the whole table.His aura is intimidating. keeping his gaze fixed on his documents.he hears footsteps come to his room

Jungkook :"Why the hell are you here at this time!?"

He says angrily in his usual cold tone and deep voice.