"Four different couples have a romantic week over New Year's Eve. Both coming out of failed marriages, Ji-ho and Hyo-young are not open to the possibility of new love, while Jin-ah heads to the other side of globe and encounters Jae-hun."
Kim Kang-woo
as Ji-ho
Yoo In-na
as Hyo-yeong
Yoo Yeon-seok
as Jae-heon
Lee Yeon-hee
as Jin-a
Lee Dong-hwi
as Yong-chan
Chen Duling
as Yaolin
Yeom Hye-ran
as Yong-mi
Sooyoung Choi
as O-wol
Teo Yoo
as Rae-hwan
Ye Su-jeong
as Hye-shim
Kim Kwang-kyu
as Police Department Chief
Nam Bo-ra
as Neighborhood
Ra Mi-ran
as Marriage Doctor
Lee Jun-hyeok
as Coach
Oh Sang-jin
as Radio DJ
Cho Han-cheul
as Mr. Yoon
Ahn Se-ha
as Police Baek
Ponchy Brusse
as Jose
Song Sang-eun
as Detective Song
Lee Ji-ha
as Ski Resort Manager
Kim Ji-young
as Namsan
Son Jong-hak
as Wholesaler
Choi Si-won
as Ex-boyfriend
Seo Hyun-woo
as Hyo-yeong's Husband
Park Kang-seop
as Reporter
Kim Min-seo
as Ji-ho's Daughter
Jeong Gyu-su
as Real Estate Agent
Kim Yong-ho
Stunts
Kim Deok-du
Set Decoration
Jeong Woo-cheol
Adaptation
Kim Dong-myeong
Visual Effects Supervisor
Lim Wang-sub
Jung Hyun-ju
Executive Producer
Min Kyu-dong
Oh Seung-chul
Director of Photography
Choi Yun-ui
Lighting Director
Shin Min-kyung
Editor
Choi Im
Production Design
Tae Wook
Props
Choi Eui-young
Costume Design
Shin Yeon-jeong
Makeup & Hair
Gong Tae-won
Sound Supervisor
Park Young-sik
Martial Arts Choreographer
Park Sun-hye
Producer
Ahn Bock-nam
Production Sound Mixer
Lim Sun-ae
Storyboard
Park Jae-sung
Line Producer
Hong Ji-young
Director
Ko Myung-ju
Writer
Ham Hyeon-gyeong
Min Jin-soo
Lee Ji-soo
Original Music Composer
Kim Dong-jin
Key Grip