[COMPLETED]♦️How can someone hold their pressure when you have a really bad, annoying, tomboyish step sister. Park Haneul is a son of the world richest CEO. He always humble and always obey his dad but when his dad come to marry a single mother, his dad always beat him for no reason and it makes Haneul more stress when the daughter keeps bullied him but something from bullied can change his step sister to a lovers. Will Haneul manage to get through all this things by himself? Or will Ryujin fall for his own step brother? find out more in RYUJIN:the STEP SISTER♦️ ▶️MALE READER X ITZY RYUJIN◀️ ▶️SMUTS,FLUFF AND ANGSTY CONTAIN◀️