Demon Slayer: A World of Reverse Survival (What If He/She Had Survived?)

What if the world were reversed, and the ones who survived were them... When Giyu Tomioka accidentally entered this world through a strange Blood Demon Art, Tomioka Toko, one of the twin Water Hashira, covered her face and burst into tears at the sight of him. Sabito's eyes also reddened. Giyu Tomioka and his sister survived that night together, but he died at Mount Fujikasane at the hands of the Hand Demon, protecting Sabito. Shinobu Kocho had been killed by Doma three years earlier while she and her sister fought Upper Rank Two together. The Wind Hashira, Sanemi Shinazugawa, died while killing Lower Rank One alongside his friend Masachika Kume. His best friend had been helping take care of Genya Shinazugawa ever since. Fifteen years ago, Doma deliberately ate the child of the Thunder Hashira, Kotoha Hashibira, right in front of her just to tease her. After breaking down, she fled for her life, learned a Breathing Style on her own, and joined the Demon Slayer Corps. Nezuko Kamado joined the Demon Slayer Corps and fought side by side with her younger brother, Tanjiro Kamado, who had become a demon. Giyu Tomioka: ...?! Theme: A world where everyone is reunited.