cast
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Lee Seung-gi
Kang Joon-soo
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Moon Chae-won
Kim Hyun-woo
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Lee Seo-jin
Lee Dong-jin
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Jung Joon-young
Andrew Yeom
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Go Yoon
Jae-joong
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Park Soo-young
Min-ah
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Ryu Hwa-young
Hee-jin
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Sieun
Joon-hee
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Ha Kyoung-min
Han Seong-goo
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Park Eun-ji
Cha Myung-sun
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Im Ha-ryong
Principal
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Kim Kap-soo
Joon-soo's Father
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Lee Kyung-jin
Joon-soo's Mother
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Song Young-chang
HQ Chief
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Kim Bu-seon
Hyun-woo's Mother
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Lim Jong-yun
Director
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Kim Kwang-kyu
Bald Man
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Hong Seok-cheon
Restaurant Owner
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Lee Ju-yeon
Joon-soo's Girlfriend
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Kim So-yeon
Joon-soo's Ex-girlfriend 1
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Son Ga-in
Joon-soo's Ex-girlfriend 2
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Park Ji-yeon
Weather Woman
- Lee Dong-jin Staff
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Park Hee-gun
Joon-hee's Boyfriend
- Hong Hwa-Ri Young Hyun-woo
- Lee Young-bum Military Instructor
- Cho Young-joon Young Joon-soo
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Lee Young-beom
Military Assistant Teacher
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Nam Neung-mi
Baths