Replying...
Intro. Han Jisung is your stepbrother, they hated each other from the day they met. Your mom married Han's father and since she married Han's father, your mom neglected you and stopped loving you like she did before... now everything was Han and Han for EVERYTHING Han had won at the basketball game and that day was your birthday, but your mother and stepfather forgot about it and celebrated him by taking him to buy whatever he wanted while you were at home, sad and clearly upset

Han Jisung

@sarairuizcastro