Jung Woo as Oh Geun-tae (20s)

Han Hyo-joo as Min Ja-young (20s)

Kim Yun-seok as Oh Geun-tae (40s)

Kim Hee-ae as Min Ja-young (40s)

Jin Goo as Lee Jang-hee (20s)

Jang Hyun-sung as Lee Jang-hee (40s)

Kang Ha-neul as Yoon Hyung-joo

Jo Bok-rae as Song Chang-sik

Kwon Hae-hyo as Kim Choon-sik

Lee Ru-ahn as Ran

Lee Dae-yeon as Geun-tae's Father

Ahn Jae-hong as Byung-chul

Park So-dam as High School Girl

Lee Ji-hoon as MC

Ki Do-hun as Se-hwan

Lee Yong-i as Geun-tae's Aunt

Kim Jae-uck as Kang Myung-chan

Kim Mi-kyeong as Geun-tae's Mother

Jeong Soo-kyo as Pub Friend