He Has Died for Me for Four Lifetimes. It's My Turn to Protect Him in This Round.

He died for me four lives. The burning book table, the arrows from the border city, the poison in the deep palace, the nine heavenly tribulations - he died in my arms in every life. In this life, the evil clan not only wants to destroy the country, but also wants to eradicate its roots. They don't intend to keep any of the seven thousand years of words, clothes, and beliefs. I dress up as a military advisor to a subjugated country. In front of me, civilization has been wiped out and mountains and rivers have collapsed. Behind me are the dead souls of four generations, with overwhelming love. The evil tribe said that the curse of reincarnation is unbreakable and that encounter is a fatal situation. The deeper the love and the stronger the pain, the stronger they become. Then I must love him the deepest, so deep that reincarnations are cut off endlessly, so deeply that he bows his head even to curses, so deeply that he will be protected until the day when he defeats the evil tribe, revives civilization, and rebuilds the mountains and rivers. In this life, it's me who will guard it. This is a story about the reincarnation of four generations, the revival of civilization, and the reconstruction of mountains and rivers. The female protagonist uses ancient books as a sword and culture as a blade, and joins hands with the male protagonist to rebuild the broken mountains and rivers.