Mafia stepbrothers

Here comes a girl Y/n (your name).Y/N is a sweet innocent girl who lived with her mother,father and brother in busan until Y/N's father choose to leave them and took his son at the age of 2 (Y/N's age).Y/N's mom asked him the reason but without reason he took his son and left them. After that Y/N and her mom moved to america where Y/N's mom friends helped them. While in america Y/N got so many friends and she had been happy there with her friends sometimes she think of her brother and cry...until Mr.Kim (father of BTS) came to america for business purpose where he met Y/N's mom and fell in love with her. They both often met in cafe,park etc...then Mr.Kim offered Y/N's mom a secretary job where he can see her daily...and Y/N's mom accepted the offer after that Y/N and her mom moved to seoul but Y/N thought they both moved to seoul coz of her mother's job she doesn't know that her mom is dating and it had been 2 years since they moved to seoul and it's her (Y/N) second school because her mom asked her to change the school Y/N doesn't know the reason but she obeyed her mom. Now Y/N's mom going to tell her that she's been dating someone...... So what'll be Y/N reaction when she come to know that her mother is dating...........will she accept her mother to get married or not.......and mainly she doesn't know that she had stepbrothers........if she come to know that what'll be her reaction.......and will her stepbrother accept Y/N as their sister or not..... let's wait and watch.....