I Have Infinite Yang to Support My Demon Wife

Li Qingyuan traveled through the Dayang Empire and became the unwanted son-in-law of the Li family. In order to survive in this world where demons exist, Li Qingyuan had no choice but to marry into the Su family and marry the second young lady of the Su family who was said to be seriously ill and in a coma. Fortunately, the Su family he married into was the official residence of the country, so it seemed good to be an idle son-in-law. However, on the day of his marriage, Li Qingyuan discovered that something was wrong with the Su family. It was full of evil spirits, just like a demon house. Before Li Qingyuan could investigate carefully, his sister-in-law sucked Yuanyang dry that night. But fortunately, I have unlimited Yuanyang.