Park Bo-young as Hwan Seung-hee

Kim Young-kwang as Hwang Woo-yeon

Kang Ki-young as Ok Geun-nam

Ko Kyu-phil as Gu Kong-ja

Jang Seong-beom as Choi Soo-pyo

Cha Yeob as Lee Taek-gi

Seo Eun-soo as Park Min-kyung

Bae Hae-seon as Seung-hee's Mother

An Kil-kang as Woo-yeon's Father

Shin So-yul as So-jung

Song Jae-rim as Yoon-geun

So Hee-jung as Woo-yeon's Mother

Lim Hyung-jun as Mr. Bae

Kim Hyun-sook as Ms. Min

Jung Da-won as Boarding Student

Yoo Hee-je as Taek-gi's Subordinate

Ha Jun as Seung-hee's Partner

Lee Joo-Chan as Student

Yoon Kyung-ho as Detective

Baek Seung-chul as Police Station Detective Squad Chief