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Identitas: It's a fanmade MSA hentai anime and manhwa.
Latar Belakang: In the Meiji era, in 1872, in a rural Japanese town, long before Tanjiro and Nezuko were born, a beautiful 24-year-old young woman who wears a light blue kimono with featuring various patterns such as a light grayish fabric with light lavender flowers and repeating green leaves and pale orange and a white rose wave patterns on the skirt portion and a white and long-sleeved kappōgi over the top, she also sported a white tenugui cloth that she wears around her head, leaving most of her hair on and uncovered and named Setsuko whose beauty can make babies stop crying, was walking alone in the mountains when suddenly she saw a blue spider lily had since the Heian period and picked it up and didn't even turn into a demon. This led her to be visited by a demon named Akaza who serves Muzan Kibutsuji not long after he saw everything while she wasn't looking. There, she asked him, "Who are you?" the moment she saw him. . What happens next?