"Goo Nami,do you want to be my..sister?"Nami was suprised.Sister?what is this?

  "w..what?i don't understand.."Nami asked Seunghyun who look down on his shoes as his father is one speaking for him.   "so my son here,want to adopt you as his sister,I actually agree with him,and he ask me to speak to you for him,and now I want to know,are you willing to be my adopted daughter?"His father asked as she stare at the envelope. "This is a suprise for me,I mean this is too sudden,I don't know what to say.."   "no need to say anything,just sign the paper and you are officially my adopted daughter,you can go to a good college,have a nice apartment,and a trip to Europe for 3 years..what do you say?"   "Europe?what do you mean?"   "right,Seunghyun here had to attend University there and for you,you have to continue the rest of your high school days there,that means,after you came back here,you will be continuing your college year here..is that okay with you?i understand if you want to stay here,and finish your high school year here but you are going to be alone,no one is staying in Korea,which means,you are not under anyone supervision,I'm afraid you might you have to follow Seunghyun along.."He puts both hands on his back and walk to the window where he can see each part of Korea.   "fine..I'll follow him,to Europe.."Nami answered,looking over at Seunghyun and his father,which is now her father too.   "alright..you can sign the paper inside the envel