Song Joong-ki

as Sun Woo-hae

as Yoon Hyun-woo / Jin Do-jun

as Vincenzo Cassano / Park Joo-hyung

as Eunseom / Saya, Saya

as Banker

as Webtoon writer / Jo Suk's friend

as Yoo Shi-jin

as Kang Ma-ru

as Goo Yong-ha / Yeorim

as Self – Former Member

as Host