Cast of One Fine Day

Main cast

Gong Yooas Seo Gun

Sung Yu-rias Seo Ha-neul / Park Hae-won

Jeong Dong-hwanas Park Jin-kwon

Ahn Yeon-hongas Kim Mal-ja

Namkoong Minas Kang Dong-ha

Lee Sa-bi

Lee Sa-bias Choi Sun-kyung

Lee Yeon-heeas Goo Hyo-joo

Kang Seong-jinas Koo Seong-chan

Lee Ki-yeolas Koo Kyung-Taek