Claim: Oh Yeon-seo is a performer.

Shine or Go Crazy is a 2015 South Korean television series based on the novel of the same name by Hyun Go-woon about the romance between a Goryeo prince and a Balhae princess . Starring Jang Hyuk , Oh Yeon-seo , Lee Ha-nui and Lim Ju-hwan , it aired on MBC from January 19 to April 7 , 2015 on Mondays and Tuesdays at 22:00 for 24 episodes .