Cast
YERIOh Ha-rinYERI was 22 in Blue Birthday - Season 1 - Rule of Equivalent Exchange (Episode 4).
Birthday: Wed, May 05 1999
Yang Hong-seokJi Seo-junYang Hong-seok was 27 in Blue Birthday - Season 1 - Rule of Equivalent Exchange (Episode 4).
Birthday: Sun, Apr 17 1994
Lee Sang-junCha Eun-seongLee Sang-jun was 23 in Blue Birthday - Season 1 - Rule of Equivalent Exchange (Episode 4).
Birthday: Tue, Mar 03 1998
Kim Gyeol-yuDo Su-jinKim Gyeol-yu was 21 in Blue Birthday - Season 1 - Rule of Equivalent Exchange (Episode 4).
Birthday: Tue, Apr 11 2000
Ju HyeonKim Ui-yeongJu Hyeon was 26 in Blue Birthday - Season 1 - Rule of Equivalent Exchange (Episode 4).
Birthday: Tue, May 23 1995
Kim Yi-seoJi Hye-minKim Yi-seo was 25 in Blue Birthday - Season 1 - Rule of Equivalent Exchange (Episode 4).
Birthday: Wed, Feb 21 1996