Kim You-jung as Na Bo-ra

Byeon Woo-seok as Poong Woon-ho

Park Jung-woo as Baek Hyun-jin

Roh Yoon-seo as Kim Yeon-du

Kim Sung-kyung as Bo-ra's Mother

Jeong Seok-yong as Bo-ra's Father

Yoon Yi-reh as Madam

Jeon Hye-won as Darn It

Kim Nu-rim as Dong-wook

Han Hyo-joo as Adult Na Bo-ra

Lee Beom-soo as School Teacher

Ryu Seung-ryong as Poong Woon-ho's Father

Park Hae-jun as Doctor at School Infirmary

Gong Myeong as Jung Woon-ho

Ong Seong-wu as Joseph / Poong Joon-ho

Kang Chae-young as Bok-soon

Bang Woo-ri as Yeon-du's Mother

Lee Cheon-mu as Bo-ra's Brother

Jo Ji-hyeon as Teacher

Lee Woo-sung as Min Hong-gi

Choi Kyo-sik as Mailman

Jeong Min-jun as Young Joseph

Shin Dong-ryeok as Mulberry Extract Vendor