Reborn: a Daughter's Revenge

In my past life, after my parents, who were National Heroes, went missing, I gave up my studies to search for them. My hair turned white overnight when I learned they had sacrificed their lives for the country. However, not only did they settle down and adopt a new daughter, but they also successfully completed their mission. When they returned in glory, they refused to acknowledge me! But in the end, they knelt, admitted their mistake, and begged me to teach them how to be parents.