스프링 피버

안보현

as Seon Jae-gyu

이주빈

as Yoon Bom

차서원

as Choi Yi-joon

조준영

as Seon Han-gyeol

이재인

as Choi Se-jin

나영희

as Jeong Nan-hee

조승연

as Yoon Jeong-ki

Im Su-hyung

as Oh Seong-tae

진경

as Seo Hye-sook

배정남

as Jeong Jin-hyeok

오만석

as Hong Jeong-pyo

Jung Young-ki

as Wi Jeong-hwan

김병춘

as Seok Gwan-su

서상원

as Choi Chan-gu [Se-jin's father]

Kim Sun-hye

as Lee Jin-hui [Se-jin's mother]

손여은

as Seon Hui-yeon [Jae-gyu's older sister]

An Sang-Jin

as Kim Dae-han

Choi In-U

as Kim Min-guk

Lee Jae-Mu

as Oh Dong-pyo

정마린

as Grandmother

Son Gyung-Hee

as Yang Bok-Hee

Cha Hee

as Neighborhood grandma

Kim Hye-jung

as Neighborhood grandma

Kim Ho-Joon

as Gym owner

Han Joo-Hyun

as Yoon Bom (child)