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アイデンティティ: It's a fanmade MSA anime and manhwa.
背景: In the Taisho era, in 1913, a 19-year-old young woman named Mutsumi from the noble family called the Hashimori family got married to a 28-year-old man named Atsushi from the noble family called the Sugimoto family and afterwards, she got pregnant with his first child that is a boy and they named him Hayato before he was born. 8 months later, she gave birth to Hayato in a natrual vaginal birth. They lived a happy life. 2 years later, in 1915, when she was 25, she was pregnant with his two children that are twins a boy named Satoshi and a girl named Shiori and 5 months later, she gave birth to both of them in a natrual vaginal birth. Afterwards, they lived a peaceful life together. However, her husband Atsushi died from bronchitis, making Mutsumi a single mother. One day, while walking alone in the mountains, she saw blue spider lilies and picked some and didn't even turn into a demon like Muzan Kibutsuji which intrigued the attention of Doma who watched everything from afar. He informed everything to Muzan Kibutsuji. . . What happens next?