Lee Sun-kyun

as Do Hyun-woo

Song Ji-hyo

as Jung Soo-yeon

Kwon BoA

as Kwon Bo-young

Lee Sang-yeob

as Ahn Joon-young

Kim Hie-won

as Choi Yoon-gi

Ye Ji-won

as Eun Ah-ra

Lee Do-yeon

as Eun Min-ji

Kim Kang-hoon

as Do Jun-soo

Ye Su-jeong

as Hyun-woo's mother

Kim Hye-ok

as Da-ye / "Ms. Jade"