Baekhyun's Adopted Sister ( EXO Baekhyun Fanfic )

This is the first time i'm writing a fanfiction so it might not be very good but i hope you like my story! I am planning to make it very long if i have enough support so pls do comment if u want me to do more. Eun-seo is the adopted child of Mr and Mrs Byun who has their own biological child, Byun Baekhyun. Baekhyun...