In Gyo-jin

Park Yong-gil

Choi Min-seok

Yook Ho: the oldest boarder in Ihwawon Inn.

Joo Sang-hyeon, Yunis's Tiger coach due to his austere personality and strict rules. So he leads the team. Hence, he is known as 'Juralli' for players.

Jang Young-guk, Hwa-jung's ex-husband. He is the youngest district head who used to be a seventh grade civil servant.

Kim Hwak-se

In Gyo-seok

Hwang Doo-sik, Yong-sik's second brother (Ep. 26)

Kwak Ha-ni (ep. 5)

Park Moon-bok, soldier who worked as a medic in the army

Kang In-han

Managing Director Jo Sang-moo (44 years old) as himself (Cameo appearance, ep. 16)

Oh Man-sang, Maths teacher

Hong Sam-gyu

Hong Doo-sik

ER Doctor (Ep. 1–2)

Im Soo-yong

Hwang Kyung-chul

Gyo Ji-hoon

Jin Hyun-woong

Man no. 1

Soo-jin's husband (cameo, ep 12)

Han Jung-min

Lee Seong-hoon

Lee Sung-ryong

Mi-na's husband

Lee Byung-chul

Kim Yong-chun

Park Ha-jin