Director
Screenwriter
Main Role
- Jung Il WooLee Yoon Ho [Brother]Main Role
- Kim Hye SungLee Min Ho [Brother]Main Role
- Choi Min Yong Main Role
- Lee Soon JaeLee Sun JaeMain Role
- Na Moon HeeNa Mun HuiMain Role
- Park Hae MiPark Hae Mi [Mother]Main Role
- Jung Joon HaLee Joon Ha [Father]Main Role
Support Role
- Seo Min JungSeo Min JungSupport Role
- Shin JiShin Ji/ Ela mesma / Shin Bong HeeSupport Role
- Kim BumHimself [Student / Min Ho's best friend]Support Role
- Hwang Chan Sung Support Role
- Hong Soon Chang[Vice principal]Support Role
- Kim Ji HooDirector Kim Byung UkSupport Role
- Park Min YoungKang Yoo Mi [Student]Support Role
- Cha Seung JoonYeum Seung HyunSupport Role
- Seo Bae JoonYun MinSupport Role
- Na Hye MiHye MiSupport Role
- Kim Kyung Ryong[Yoo Mi Ah's father]Support Role
- Yoon Seo HyunDetective LeeSupport Role
- Jung Seon UYoo Hui Jin [Nurse]Support Role
- Jeong Shin WooYoo Hee-Jin [Nurse]Support Role
Guest Role
- Park Chan Yeol Guest Role
- Noh Joo Hyun[Min Jung's father] (Ep. 125)Guest Role
- Jo Young MinYoon Ho [Young]Guest Role
- Park Jung Soo[Hae Mi's mother] (Ep. 80)Guest Role
- Kim Mi Ryu Guest Role
- Lee Tae RiLee Soon Jae [Young grandfather]Guest Role
- Jung Ji AhnNa Moon Hee [Young grandmother]Guest Role
- So Yoo Jin[Housemaid] (Ep. 107)Guest Role
- Kwon Oh Jung[Student teacher] (Ep. 101)Guest Role
- Jang Se Hyun[Kim Beom's friend]Guest Role
- Lee Se YoungLee Se Young [10th grade student] (Ep. 143)Guest Role
- Clara LeeKim Yun Ju (Ep. 64)Guest Role
- Kim Hee JungMi Hyun (Ep. 164)Guest Role
- Park Joon Geum[Min Jung's mother] (Ep. 154, 161)Guest Role
- Yoon Seung AhYoon Seung Ah (Ep. 94, 98)Guest Role
- Ivy[Hospital patient] (Ep. 97)Guest Role
- Yang Jung Won[Yoo Mi's friend]Guest Role
- Tablo[Teacher] (Ep. 150)Guest Role
- Kim Seon Eun[Bodyguard]Guest Role
- Im Seung Joon Guest Role
- Hong Seung Beom[Reporter]Guest Role
- Kim Gwang In Guest Role
- Jung Byung Ho Guest Role
- Gong Jae Won[Family photographer]Guest Role
- Kim Young OkGyun Gae [Soon Jae's cousin]Guest Role
- Lee Jung Sung[News anchor]Guest Role
- Chun Myung Hoon[Man approaching Shin Ji] (Ep. 26)Guest Role
- Jo Won Suk[Wicked musical director] (Ep. 83)Guest Role
- Sung In Ja Guest Role
- Jung Jin Young[Chicken Delivery Man] (Ep. 108)Guest Role
Unknown
- Kim Chu Wol Unknown
- Kang Soo Young Unknown
- Son Young Sun Unknown
- Jo Yi Haeng Unknown
- Yoo Ok Joo Unknown
- Baek Chan Ki Unknown
- Son Jung Rim Unknown
- Seo Kwang Jae Unknown
- Kim Han Jun Unknown
Bit part
- Han Tae Kyeong Bit part
- Kim Sang Shik Bit part
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