정우성

Su-hyuk

김남길

Woo-jin

김준한

Seong-joon

박유나

Jin-ah

류지안

In-bi

박성웅

Eung-guk

이엘리야

Min-seo

김주헌

Jun-ho

김문학

Security Team Leader

박용

Minister Shin

이효비

Jun-ho's Daughter

최수임

Ballet Teacher

길창규

Old Gentleman

오경택

Security

송지우

In-bi's Friend

신윤주

In-bi's Friend

이가연

In-bi's Friend

권은성

Kickboard Kid

강신하

Voice Appearance

이두석

Voice Appearance

민상우

Voice Appearance

박진영

Hospital Staff (voice)

박성근

Big Brother