Saving the Succubus Is Saving the World

Yu Lin came through time with the grand mission of saving the world, but found that the world was hundreds of millions of ways different from what he imagined. The succubus eldest daughter of the fallen nobleman was lying weakly on the ground, begging for him. Yu Lin fell into deep thought... It said it was saving the world, but it didn't say it was saving the succubus world! No matter! If you can't save one demon, how can you save the world?