Cast Introduction

1. Main Casts

Kim Hyeyoon as Kim Hyeyoon (28)

Graduates from Konkuk University

Went to the University of Melbourne to continue her master degree

~ Past Boyfriend, Kim Seok-woo
~ Current Boyfriend, Jang Ki Yong who she met in Melbourne

Kim Seok-woo/Rowoon (28)

Graduates from Konkuk University
Had his master degree at the Delft University of Technology, Netherlands
Hyeyoon past boyfriend

Jang Ki Yong (32)

Manager of the Planning Division.

Graduated from the Ph.D. program at the University of Melbourne

He met Hyeyoon when he was on the Ph.D. program in Melbourne
Once they back to South Korea, he recruited Hyeyoon to be one of the members of his project
He fell in love with the girl, and they finally date. 

2. Supporting Casts

- Seol In Ah
- Kim Inseong
- Kim Youngdae
- Kim Jeein
- Jung Geonjoo
- Kim Seoran
- Mr. and Mrs. Kim
- Lee Jaeyoon
- Other minor casts