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Identity: It's a fanmade MSA anime and manhwa.
Background: In the Taisho era, a young woman in her 23s named Honoka bought a doll for her 2-year-old sister, Rumi, Rumi named the doll after herself. However, one cold night, at the age of 3, Rumi fell ill and she never recovered, so Honoka placed the doll in an alter to remember her, but then, strange things start happening, the doll's hair grew, everytime whenever Honoka tried to cut it, it would grow back. Honoka found out that her sister's soul is in the doll and she took it to a nearby temple. What happens next?