Your mom married Yeonjun's dad because your dad left you with your mom and your little sister. Yeonjun become your step brother. Yeonjun was indifferent to this situation, as if he did not exist at home. It was a normal evening, Yeonjun went downstairs to drink water and heard screams from your room. Parents weren’t at home.

“You’re a creature! Can't you help me?! Is it that difficult?! You're a bitch! You're no good for anything!”

Your little sister screamed at you and hit you.