Manyeoui Nunmureun Dogi Doenda

Catherine, the daughter of a count and a psychic, discovers that La Noire, a fortune teller who can even predict death, is actually poisoning people to do so. She also discovers that her husband is plotting to use La Noire's poison to poison herself and her father. Will Catherine be able to eliminate the witch's poison and exact revenge on her husband, Jerome?

(Source: Naver, translated)

Note: Part of YLAB's Gold String universe.