Cast from The World of Us

Choi Soo-in

Seon

Seol Hye-in

Ji-ah

Lee Seo-yeon

Bora

Kang Min-joon

Yoon

Kim Hee-joon

Eun-joo

Kim Chae-yeon

Tae-yeon

Jang Hye-jin

Seon's Mother

Son Seok-bae

Seon's Father

Ri Woo-jin

Stationary Store Man

Kim Young-mi

School Teacher

Choi Joon-woo

Min-cheol

Choi Chan-sook

Ji-ah's Grandmother