• 
  Su-hee Go

   Han Gong-joo
• 
  Hyun-wu Ji

   Park No-ah
• 
  Baro

   Hong Sang-tae
• 
  Geun-hyeong Park

   Kang Soo-chan (as Geun Hyung Park)
• 
  Yeong-gyu Park

   Hong Sang-bok
• 
  Hee-Seon Kim

   Jo Kang-ja
• 
  Yun-a Oh

   Joo Ae-yeon
• 
  Yoo-Jeong Kim

   Oh Ah-ran

• 
  Hee-won Kim

   Ahn Dong-chil
• 
  Soo Young Park

   Wang Jung-hee
• 
  Ji-soo

   Go Bok-dong
• 
  Ye-Joo Yoon

   Jin Yi-kyung
• 
  Ji-yeong Kim

   Kang-ja's mother-in-law (9 episodes, 2015)
• 
  Byeong-chun Kim

   Oh Dal-bong (12 episodes, 2015)
• 
  Hyeong-jun Lim

   Oh Jin-sang (13 episodes, 2015)

• 
  Gook-hwan Jeon

   Park Jin-ho (12 episodes, 2015)
• 
  Ji-hie Seo

   Hwang Min Joo (15 episodes, 2015)
• 
  Tae-hoon Kim

   Do Jung-woo (16 episodes, 2015)
• 
  Hye-jeong Sin

   Hwang Song-hee (11 episodes, 2015)
• 
  Yoo-sang Jang

   Oh Geun-Soo (aka mackerel) (8 episodes, 2015)
• 
  Ye-Seul Choi

   Ahn Tae-hee (15 episodes, 2015)
• 
  Se-yun Han

   Na Do-hee (15 episodes, 2015)
• 
  Seul-ki Kim

   Jong Man (15 episodes, 2015)
• 
  Nam-Yong Seo

   Sang Man (15 episodes, 2015)
• 
  Soo Young Park

   Wang Jung-hee (16 episodes, 2015)
• 
  Jung Shin-Hye

  Lee Hwang Song (grade 2 class 3)