The First Night with the Duke

Seohyun

Cha Seon-chaek / K

Taecyeon

Prince Kyungsung / Lee Beon

Kwon Han-sol

Cho Eun-ae

Seo Bum-june

Jeong Su-gyeom

Chi Hae-won

Do Hwa-seon

Lee Tae-seon

Prince Seonghyeon

Seo Hyun-chul

Cha Ho-yeol

Yun Yoo-sun

Yoon Deok-jeong

Lee Sang-un

Cha Jang-ho

Kim Shin-bi

Cha Du-ho

Yoon Jung-hoon

Cha Se-ho

Song Yeong-jae

Lee Beon's Head Servant

Ju Seok-tae

King Seoljong

Nam Kee-ae

King's Mother