Song is set to play Sunyang Group's family secretary Yoon Hyun-woo, who dies after being framed for embezzlement and later miraculously reborn as the family’s youngest son, Jin Do-joon. Multiple award-winning actor Lee Sung-min, best known for his role in the 2018 espionage film The Spy Gone North, has been confirmed for the role of the relentlessly competitive and ruthless Jin Yang-chul, the head of Sunyang Group.
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Other potential cast members include Girls’ Generation’s Tiffany Young, who has reportedly been offered the role of Rachel Arief, the Korean-American CEO of Miracle Investments. The K-pop star, who has been actively promoting her solo activities, recently starred as the leading role of Roxie Hart in the South Korean musical production of the Broadway hit, Chicago. If Tiffany accepts the role, she'll be making her small screen debut with this drama.