my beloved sister was forced to marry a middle-aged oyashi, kasaka kori.

My sister and I have more special feelings than just my brother-sister relationship. ■"I'd like to be a wife of my brother in the future" is one notification that I received from the country... It is a rape marriage courtesy letter by the new system "Child Making Promotion Law"! Suddenly a middle-aged oyster and her sister, who was made into a married couple, were forced out of their first hearts! But my sister is jealous of the skillful tech she has never experienced before, and begging for a middle-seat against someone who should have been disliked by shaking his waist...!!