Blue Birthday Season 1 Episode 4 Rule of Equivalent Exchange ( Air Date 2021-07-31 ) Genre Sci-Fi & Fantasy, Drama, Mystery category. Overview "The series tells the story of Oh Ha-rin, who travels to the past through mysterious photos left by her first love, Ji Seo-jun. Since they were eight years old, they had been close friends, but he died by suicide on her birthday ten years ago.".
Blue Birthday Season 1 Episode 4 Rule of Equivalent Exchange
5.5/10 by 24 users
- Watch: Blue Birthday Season 1 Episode 4 Rule of Equivalent Exchange on CWR-CRB
- Stars: YERI, Yang Hong-seok, Lee Sang-jun, Kim Gyeol-yu, Ju Hyeon
- Director: Park Dan-hee, Ku So-yeon, Moon Won-young, Kwak Kyung-ho, Jang Il-ji
