Nam Ji-hyun

~ as ~

Park Jin-ju (Blue Bird on the Desk)

Jung Jin-an

~ as ~

Ma Jin-ju (Blue Bird on the Desk)

Kwon Eun-soo

~ as ~

So Young (U and Me)

Oh Ji-hye

~ as ~

Chul Goo's Mother (U and Me)

Park Bo-young

~ as ~

Hee So (Relay)

Son Eun-seo

~ as ~

Gyu Ri (Relay)

Sung Ji-ru

~ as ~

Teacher (Blue Birds on the Desk)

Moon Sung-keun

~ as ~

Vice Principal (Relay)

Jung Yu-mi

~ as ~

Health Teacher (Relay)

Kim Mi-hui

~ as ~

(Relay)