The Lost Daughter

Y/N Potter is Harry's younger Sister
and has to safe his life because he has a
deadly disease whose therapy is very
expensive. One day she meets a handsome young boy named Draco Malfoy and the both of
them fell in love very quickly but later it turns out that Draco is the brother of her best friend who tragically died and asked Y/N to pretend to be her, because the two almost look like twins.