낭랑 18세

Lee Dong-gun

Kwon Hyeok-Jun

한지혜

Yoon Jung-sook

이준

Ji Nam-Cheol

Kim Hae-sook

Jung-Sook's mother

Le Da-hee

Mun Ka-Yeong

이은주

Seo Hyun-Ju

Jung Kyung-ho

Jung Sook's blind date

Ko Kyu-pil

Hyuk Joon's co-worker