Season 1

Kim Ji-hoon

Lee Gwang-Jae

Kim Joo-hyun

Kim Young-Ha

Lee Kyu-han

Nam Tae-Il

Hong Soo-hyun

Kim Kyung-Ha

Woo Hyeon

Choi Hyo-Dong

Lee Seung-yun

Nam Soo-Hee

Kim Min-gue

Kim Myung-Ha

Jeon Soo-kyeong

Na Young-Ae

Yun Yoo-sun

Park Hyun-Sook

Jung Bo-seok

Kim Won-Yong

Kang Nam-gil

Lee Gye-Dong

Kim Yeong-ok

Park Soon-Ok

Cha Seo-won

Choi Yong Yi [Yeong Ha's neighbor]

Mi Ram

Kim Sun Young

Yoon Cheol-hyeong

Chairman Nam Soo Hwan [Nam Soo Hee's brother]

Elkie Chong

Wang Mong Mong [Transfer Student]

Park Soon-cheon

Bok Soon

Park Jae-jung

Kim Jong Yong [Yeong Ha's uncle]

Shim Eun-jin

Myung Sun [Jong Yong's wife]

Yang Hye-ji

Park Seo Hee [Yong Yi's sister]