Swamp Ecology Report

Sung Joon

Choi Gyu Seok / Choi Goon

Kim Chang-hwan

Jae Ho

Jung Young-ki

Jeong Gun

Lee Jae-won

Nok Yong

Goo Jae-yee

Yun Jeong

Choi Tae-hwan

Sang Jin

Seo Hyun-chul

President Lee

Mahbub Alam

Almon

Um Tae-goo

"Hyung Nim"

Lee Hee-jun

[Gyu Seok's cousin]

Jun Sung-ae

[Gyu Seok's aunt]

Lee Dae-yeon

[Landlord]

Park Yong-yeon

[Stalker]

Son San