Award-winning novel! In Meiji 34, Yoko, the youngest daughter of the Takatsukasa family, one of the five great families, invents a way to synthesize white thread from a chemical solution at the tender age of four. This thread is made of a substance that, in real history, would be called "66 nylon," a material that was supposed to have been discovered in America. This is because Takatsukasa Yoko is a polymer chemist from the future, over 120 years later in the Reiwa era, who has been reborn with her memories intact. This is the story of a polymer scientist reborn in an era without polymers, striving to change the history of Japan. Note: Because of the time period, the story deals with war, so it is marked as containing cruel depictions.