The Empress's husband

A modern medical researcher travels back in time to an ancient kingdom, bound to a system that rewards him for healing others. To earn enough points to return home, he tirelessly treats villagers for free, earning their deep respect. When a princess discovers his extraordinary skills during a disaster relief mission, she brings him to the capital to treat the ailing empress. Using modern medical techniques, he defeats two ruthless princes in a struggle for power—ultimately protecting the realm and ushering in an era of peace and prosperity.