Twenty Five Twenty One

Kim Tae-ri

Na Hee-do

남주혁

Baek Yi-jin

보나

Ko Yu-rim

최현욱

Moon Ji-woong

이주명

Ji Seung-wan

Kim Hye-eun

Yang Chan-mi

Choi Myeong-bin

Kim Min-chae

주보영

Lee Ye-ji

최민영

Baek Yi-hyun

Kim So-hyun

Adult Na Hee-do

박윤희

Baek Sung-hak

Kim Young-sun

Yi-jin's Mother

소희정

Seung-wan's Mother

서재희

Shin Jae-kyung

Lee Ye-jin

Park Han-sol

허지나

Yu-rim's Mother

Kim Dong-gyun

Yu-rim's Father

이찬종

Seo Joong-hyuk

최시아

Baek Su-yeong

정형석

Kim Hak-gyu

옥주리

Ahyeon Supermarket owner

Park Yoon

Jung Da-yeong

Cho Min-wook

Kwon Dung-uk

이선구

National fencing team coach

박정표

Yi-jin's maternal uncle

Yoon Se-woong

Seo Yeong-seong

Moon Woo-bin

Kang Ji-soo

방은정

Lee Da-seul

정충구

Myeongjin Book Rentals owner

Ok Ye-rin

Na Hee-do (young)

Kim Bum-joon

Ji-woong's friend

Kim Ha-ru

National team fencer

이동규

UBS Network Sports anchor

최태준

Jung Ho-jin

Baek Suk-kwang

Na Sung-jin

정용주

Delinquent boy

Lee Joong-ok

Fencing club coach

리민

Chinese restaurant owner

Bae Seong-il

Mr. Baek's ex-employee

경다은

Ko Yu-rim (young)