She'll be playing opposite actor Han Joo Wan, who has been cast in her romantic interest Shim Kang Myung. Shim Kang Myung is the homeroom teacher for the main character played by Gugudan's Kim Se Jung. The staff said, "Han Joo Wan and Sunhwa will play characters who have opposite personalities and meet as a teacher and school police. They'll grow together with the students and start a pure romance. Every season, the teachers balanced out the drama between the students. Please look forward to the two actors."