Cast
Main
1. Lee Jong-suk as Park Hoon 박훈➡24
Goo Seung-hyun as young Park Hoon➡9
2. Jin Se-yeon as Song Jae-hee 송재희/Han Seung-hee한승희➡19
Seo Ji-hee as young Song Jae-hee
3. Park Hae-jin as Han Jae-joon 한재준/ Lee Sung-hoon 이성훈➡30
Kim Ji hoon as young Lee Sung-hoon➡13
4. Kang So-ra as Oh Soo-hyun 오수현➡23
Shin Soo-yeon as young Oh Soo-hyun➡9
Supporting
5. Park Hae-joon as Cha Jin-soo➡37
6. Chun Ho-jin as Prime Minister Jang Seok-joo➡53
7. Jeon Gook-hwan as Oh Joon-gyu
8. Choi Jung-woo as Moon Hyung-wook➡56
9. Nam Myung-ryul as Choi Byeong-cheol
10. Yoon Bora as Lee Chang-yi➡24
11. Kim Sang-ho as Yang Jeong-han➡43
12. Hwang Dong-joo as Geum Bong-hyun
13. Kang Tae-hwan as Oh Sang-jin
14. Lee Jae Won as Kim Chi-gyu
15. Kim Bo-mi as Kim Ah-young➡26
16. Uhm Soo-jung as Min Soo-ji
17. Han Eun-sun as Eun Min-se
18. Jung In-gi as Kim Tae-sool➡47
19. Kim Ji-eun as Joon-gyu's secretary➡25
20. Kim Yong-gun as President Hong Chan-sang➡67
21. Kim Ji-young as Jeong-min➡8
22. Kim Sang-joong as Park Cheol➡48
23. Zhang Liang as Sean Zhang
