Thirty Rules for Marriage

A modern rich second-generation heir accidentally falls into the sea while drunk and transmigrates into Xiao Junlin, the heir of the Northern March Prince in the Great Xia Dynasty, known as a 'dog lover'. Abandoning his former humility, he leverages an intelligence system and modern thinking to dominate his wife, dismantle his rivals, and outsmart the emperor and powerful ministers. He gradually seizes military power in the Northern Border, alliances across the court, and ultimately departs the capital with the ministers and army to start a new chapter in the North.