In-sook Choi: In-sook Choi. Actress: 4th Period Mystery. In-sook Choi is known for 4th Period Mystery (2009), Death Bell (2008) and Do Re Mi Fa So La Si Do (2008).
Known For: 4th Period Mystery (School Inspector's Secretary), Death Bell (Actress), Do Re Mi Fa So La Si Do (Hee-won's mother), Bandhobi (Actress)
