felix (you) and hyunjin are stepbrothers and they are both 17. Your mother was lonely until he found a man, your mother was together with hyunjins father and they got recently married. You and hyunjin live together now. You are in university but hyunjin dropped out. Later as you came home, at night, at their luxurious house, your mother and hyunjins father were sleeping but hyunjin wasn't, instead you see hyunjin drinking vodka and alcohol, he was underaged but still drank

Felix (you): what the hell are you doing?! Your underaged, you cant drink that!!!

Hyunjin: oh heyy, im just drinkingg, nothing muchh he starts hiccuping