Demon Slayer: Kimetsu No Yaiba Became the Brother of Butterfly Ninja

Protagonist's abilities: traveling through time + knowing part of the plot + parallel world audience sympathy barrage, not being able to split the official version, single female protagonist, female protagonist endures. This book focuses on redemption, both for humans (Kanae) and for ghosts (Third Brother, Lianxue, and the fallen prostitute brother and sister). His soul traveled through ghosts and destroyed the world. When he was about to starve to death, he was successfully adopted by the butterfly sisters' family and was named Butterfly Toru. But Butterfly Toru was panicked. He knew part of the plot and knew that his parents who adopted him would be killed by ghosts. Brothers, what should I do? I didn't want them to be killed, but fortunately the golden finger was triggered, and I traveled to the Warring States Period and encountered the demon slayer atmosphere. The order of the story is roughly: Enichi Chapter and the first generation of the Demon Slayers → Hashiramae Chapter with Kanae and Kazuhashira → Taisho Chapter → Yuguo Chapter and Mei and the prostitute Taro → Infinite City Chapter and saving Soryu → I will write about the life after the ghosts → Maybe write about how the descendants of the Demon Slayers will fight against the return of modern ghosts. Now in the final volume, save Suliu.