Actor Cha Seo-won will play undercover detective Choi In-ha in the original musical 'Under Moonbow'. The musical opens on December 12 at NOL Seokyung Square S-Theater 2 as an IP expansion project based on a drama being developed by CJ ENM STUDIOS, bringing a crime investigation story to the stage. The work centers on Choi In-ha, an undercover detective who infiltrates a drug ring, and Gil Mo-hyun, the ring's boss, depicting conflicts over truth and lies, identity and conviction through the relationship between a detective who must become a criminal and a criminal who reveals human emotions. Cha Seo-won, Yoon Ji-sung, Lee Ju-soon and Kim Woo-seok are cast as Choi In-ha, while Lee Si-kang, Kangchan, Lee Jin-hyuk and Kim Woo-jin play Gil Mo-hyun. Ahn Yu-jin and Hong Ryun-hee play Inspector Baek, and Cho Hyun-woo and Kim Tae-oh play Lee Chang-hwan. The musical is directed by Seo Yun-mi, who worked on musicals such as 'Black Mary Poppins' and 'Aesop's Fables', with composers Park Jae-hyun and Nam Ji-young, music director Ha Tae-sung and choreographer Hong Yu-seon. Preview and first-round ticket sales begin at 11 a.m. on November 6 via NOL and Ticketlink.