Transmigrated to Grant a Wish

What will happen to a modern man who died due to an accident going to a party hosted by his soon-to-be wife? A different time? Time travel? Different era? The great general says, "Will you be my wife and fight for our love? And travel around the world, build a family in a peaceful and faraway place?" The prince says, "The emperor has a lot of concubines and consorts and you are valued more than a member of the harem. I promise to love only you till the last of forever." The emperor seriously exclaimed,"I will demolish the harem and love only you as my empress. Just be mine!" But before that, the straight HE just realized that he transmigrated to a place and time thousand of years ago and body force is valued. And he is a man(woman) that can give birth to a child!! His jaw dropped and flies happily run to his open mouth!