Marrying a Concubine: the Infrastructure Maniac Shocks the Enemy Country

I married the sick and weak prince of an enemy country on behalf of my sister-in-law. On the wedding night, my little thatched hut suddenly woke up to the national infrastructure system. I casually planted potatoes to spread the country, but I watched the prince with my own eyes become so frightened that he had a violent attack - and recovered on the spot.