- Yoo Yeon-seok (Min Jun-ho)
- Seo Hyun-jin (Kang Ji-seon)
- Ok Ja-yeon (Lee Hwa-yeong)
- Kim Ji-hyun (Kang Ji-eun)
- Lee Chun-hee (Kim Hyeong-su)
- Oh Dong-min (Park Joong-hyeon)
- Kang Ji-yong (Min Hyeon-soo)
- Jung Ji-woo (Joo Eun-hye)
- Jung Seung-kil (Jang Doo-il)
- Kim Bit (K-pop Emperor Hwang Woo-seong)
- Im Sung-jae (Park Seok-gu)
- Yoo Ha-yeon (Kim So-yeon)
- Jang In-sub (Choi Chan-soo)
- Sean Cho (Surfing coach)
- Yoo In (Ward nurse Yoon-ji)