Kim Ji-seok (actor)

Lee Pil-yo

Yu Ja-seong

Jo Dae-han (eps. 2–3)

Park Chan-hyuk

Kang Jong-ryul

Gong Ji-won Kim In-seong as young Gong Ji-won

Yu-hui's husband

Crown Prince Yi Yung (later Yeonsangun)

Guy at the club named Jin-sang (ep. 13)

Lee Jin-sang, a 36-year-old lawyer who is Do-kyung's friend. He is the first person who mistook Hae-Young (just) for Hae-young (pretty) and persuaded Do-kyung to seek revenge. Jin-sang convinced to stay in Do-kyung's house for a while to protect himself from dangerous people that are related to the case he is handling. In reality, Jin-sang is hiding from the husband of a woman who recently seduced him.

Lee Doo-jin

Yang Tae-bum

Kang Ji-woon / Jiro Kang

Dog owner (cameo, ep. 3)

Go Young-soo

Tommy Hong

Shin Ji-hoon

Wang-son ("big hand")

Han Chang-ryul

: actor (cameo, ep 1)

Petitioner (episode 1)

Kang Baek-ho

Kim Kyung-min