The Battle Between Female Partners

The heroine traveled through time and space in her previous life. She thought that even if she was the protagonist of this time and space, at least she would not be miserable. Unfortunately, she did not expect that she would not know until she died that there were other time-traveling heroines, and the other time-traveling heroine turned out to be her own sister. She lurked beside her and quietly watched her shine, and finally turned herself into cannon fodder... After being reborn again, the female supporting character is also waiting to see who will be the final winner in life if she doesn't commit suicide in this life...