Soulless Prince
Two reincarnations and a redneck isekai are fated to save the world from a demon god.
Suffer and become one with Me
The world was on the brink of ending. A thick, sulfurous miasma covered the land, leaving only small settlements clinging desperately to life in a never-ending war against the demons.
One woman, heart shattered by her beloved’s death, loosed a cry of despair that pierced the heavens. Her impassioned plea stirred a passing goddess to action. In a selfless act of love, the goddess donned the Saintess’ body and burned away the miasma to restore light and life to the world.
But this was only a short stay of execution. The dark god planned to return and consume the world he had left to marinate. Only the reborn Saintess, her Beloved, and the unexpected element of a hillbilly transmigrator have the skills to save the world.