This is a continuation of the story 'The Super!!! Genius Inventor Lady's Powerful Land Reform' (formerly titled 'My Sister is Usually the Villain'). Marianne, once known as a genius girl, has become a duchess and is living happily with her husband Alexandre and their three children. Even as an adult, Marianne's genius remains undiminished, and her inventions play a crucial role in the war, earning her the title of 'genius of the nation'. Life with her loving husband Alexandre and their three children is both heartwarming and thrilling, far from the elegant life expected of a duchess. Marianne continues to pursue her genius path, dealing with small daily incidents, the challenges of being a genius, and the struggles of raising children. Her husband Alexandre, who was a late bloomer, has become even more devoted to his wife and excels both as a duke and as the king's brother. Their three children are: - Harold (the eldest son, a serious and justice-loving boy, planned to be the next king, 6 years old) - Nicholas (the second son, nicknamed Nico, inheriting both his mother's appearance and personality, showing signs of being a genius, 3 years old) - Flora (the youngest daughter, 6 months old, resembling her father and expected to become a beauty) This story is about the heartwarming and thrilling daily life of the Marianne family. This novel is a continuation of 'My Sister is Usually the Villain, But Life is Too Precious to Not Enjoy It!' (https://ncode.syosetu.com/n0807gn/ N-code N0807GN), but can be enjoyed even if starting from this work. © Syuu All Rights Reserved. Reproduction and translation are prohibited.