An AI programmer accidentally develops an AI program called Cho Sang Shin, which will identify trashy humans, and she uses it to save people who are in difficult relationships.
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Song Ha-Yoon
Seo Ji-seong
Lee Joon-young
Jung Gook-hee
Bo-mi Yoon
Moon Ye Seul
Gong Min-jung
Tak Ki Hyun
Hwang Young-Hee
Lee Eun-hwa (Seo Ji-seong's mother)
Jeong Mi-Seong
Oh Byung-gil
Han-Sol Park
Byun Ha Ri
Tae-Gyeom Kim
Kim Sang-shik
Kyeong-il Kim
Kam Oh-jeong
Nam Min-Woo
Ok Dong Jin
Mal-Geum Kang
Hwang Ga-eul
Kim Hyun-Myung
Jo Yong Hwan
Joo Woo Jae
Han Yu Jin
Lee Si-hoon
Bang Jung Han
Ki-ri Kim
Jegal Soo Won
In-gi Jeong
Seo Ji-seong's father
Hong Yoon Hwa
Photographer
Lee Ji-Ha
Bang Jung-han's mother
