Marianne, once known as a genius girl, is now a duchess, living happily with her husband Alexandre and their three children.

Even as an adult, the genius girl's brilliance shows no sign of fading; Marianne's inventions are vital in times of war, earning her the title "the genius who saved the nation."

Her days with her husband Alexandre, who adores Marianne, and their three children are heartwarming yet constantly thrilling. It's hardly the life one would expect of an elegant duchess.

While dealing with small daily incidents, her unique worries as a genius, and the challenges of raising children, Marianne continues to forge ahead on her path as a genius.

Her husband Alexandre, a late bloomer, has grown even more devoted to his wife, and is active both as a duke and as the king's younger brother.

The three children are:

・Harold, the eldest son (a serious boy with a strong sense of justice; slated to be the next king as the royal family has no children; six years old)

・Nicholas, the second son (nickname Nico; takes after his mother in both looks and personality; shows signs of genius; three years old)

・Flora, the eldest daughter (the youngest, six months old; resembles her father in appearance; destined to be a beauty)

This story depicts the heartwarming yet thrilling everyday life of Marianne's family.

This novel is a sequel to "My Sister is Usually the Villain, But Life's Too Short Not to Enjoy It!"

https://ncode.syosetu.com/n0807gn/

(N-code N0807GN), but can be enjoyed even if read as a standalone.

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