Cha Dohyeon / Shin Segi (20 Episodes)

Oh Rijin (20 Episodes)

Oh Rion (20 Episodes)

Han Chaeyeon (20 Episodes)

Cha Gijoon (20 Episodes)

Seo Taeim (20 Episodes)

Shin Hwaran (20 Episodes)

Cha Geonho (20 Episodes)

Cha Joonpyo (20 Episodes)

Min Seoyeon (20 Episodes)

Dr. Seok Hopil (20 Episodes)

Secretary Ahn Gook (20 Episodes)

Ji Soonyoung (20 Episodes)

Oh Daeo (20 Episodes)

Yoon Jagyeong (20 Episodes)

Cha Youngpyo (20 Episodes)

Baek Jinsook (20 Episodes)

Alex Kang (20 Episodes)

Chief Choi (20 Episodes)

Employee (20 Episodes)

Dr. Kang Ingyu (20 Episodes)

Shin Seonjo (20 Episodes)

Joo Mira (20 Episodes)

Lee Youngseon (20 Episodes)

Cha Dohyeon (Young) (20 Episodes)

Oh Rion (Young) (20 Episodes)

Oh Rijin (Young) (20 Episodes)

Heo Sook-hee (4 Episodes)

Dr. Park Min-jae (4 Episodes)

Leather Jacket Biker (3 Episodes)

Jennifer (1 Episodes)

Jennifer's Father (1 Episodes)

Psychiatrist (1 Episodes)

Girlfriend (1 Episodes)

Mental Patient (1 Episodes)

Club Paradise DJ (1 Episodes)

Omega's Editor (1 Episodes)

Hong Ji-sun (1 Episodes)

Cha Do Hyun‘s high school classmate (1 Episodes)