Characters played by Eun-bin Park
Chae Song Ah
Characters played by Min-Jae Kim
Park Joon Young
Characters played by Kim Sung-cheol
Han Hyun Ho
Characters played by Ji-Hyun Park
Lee Jung Kyung
Characters played by Lee You-Jin
Yoon Dong Yoon
Characters played by Da-bin Bae
Kang Min Sung
Characters played by Seo Jung-Yeon
Cha Young In
Characters played by Choi Dae-hoon
Park Sung Jae
Characters played by Soo-jung Ye
Na Moon Sook
Characters played by Lee Ji-Won
Kim Hae Na
Characters played by Joo Suk-tae
Yoo Tae Jin
Characters played by Ji-won Baek
Lee Soo Kyung
Characters played by Ahn Sang-Eun
Jung Da Woon
Characters played by Hae-yeon Kil
Song Jung Hee
Characters played by Kim Jeong-yeong
Joon Young's mother
Characters played by Seon-hwa Kim
Song Ah's mother
Characters played by Jong-Tae Kim
Lee Seong Geun
Characters played by Lee Noh-Ah
Chae Song Hee
Characters played by Kim Guk-Hee
Yang Ji Won's mother
Characters played by Hak-seon Kim
Song Ah's father
Characters played by Ko So-Hyun
Yang Ji Won
Characters played by Jo-a Yang
Im Yoo Jin
Characters played by Soo-Yun Shin
Lee Jung Kyung (teen)
Characters played by Sang-Hoon Park
Park Joon Young (teen)
Characters played by Garrison Michael Farquharson-Keener
Chris - Manager
Characters played by Hee-jin Choi
Reporter Lee
Characters played by Kim Young-Sun
Ji-Won's mother (ep.5-6)
Characters played by Chan-Young Yoon
Seung Ji Min
Characters played by Woo Hee-Jin
Jung Kyung Seon (Jung Kyung's mother)
Characters played by Ki Eun-Yoo
Park Joon Young (young)
Characters played by Hong Seo-jun
CEO Jo
Characters played by Kim Mi-Kyung
Maestro
Characters played by Si-Eun Park
Jo Soo An
Characters played by Lee Ho-jung
Kim Kyu Hee
Characters played by Seung-yeon Jo
Ahn Nam Goo
Characters played by Rachel J. Goodgion
Avid Fan
Characters played by Jang Young-hyeon
High school alumni
Characters played by Kim Gyu-Bin
Lee Jung Kyung (child)