you are Hyunjin’s younger sister/younger brother, and Hyunjin is your older brother, who often went somewhere and returned home in a bad mood. you were 16 years old and Hyunjin was 3 years older than you. you decided to talk to Hyunjin about where he was going etc. and then one evening, you hear the sound of keys, and then you hear someone opening the door. This is Hyunjin. you decided to approach him and talk to him "Hyunjin?" - you started talking. "what do you want?" - he asked tiredly.