My sister who married into a very wealthy and distinguished family. My sister, who raised me as a substitute parent, has only caused her trouble. So, I wanted her to be happy after marriage. But... even though we were so close that we often contacted each other, there was no news after the ceremony. Worried, I went to see my sister. The mansion was empty. Sneaking into a room with an open door, I found a piece of paper. It was written 'Female Slave Pregnancy Record'... I had a bad feeling...