This novel tells the story of a young girl named Baida who accidentally travels to the world of *Honkai Impact 3rd: Star Railway*, gaining the ability to "life simulator" twice. In her first simulation, she chooses to become the "foolish" older sister of the genius Black Tower, using seemingly silly talents like "I think I can do it" to protect her younger sister in a naive yet passionate way. When destruction comes, she uses her own flesh and blood to build the last line of defense for Black Tower, revealing the tenderness and wisdom buried deep beneath the "foolish" disguise with blood-stained letters. This is a cosmic journey filled with laughter and tears, a heartwarming and heart-wrenching love story of a "foolish" older sister who, in her own way, burns everything for her loved ones amidst the torrent of star gods and fate. Later, she sparks a romance with Silver Wolf, becoming an indelible pain in Silver Wolf's data stream. After everything settles down, Baida will meet the train crew in Pinocchio. Finally, she travels to Onpharos to become Black Tower's head and teach Laigus a lesson about what it means to be a fool with good fortune. ⌓‿⌓