After nine years together, a wealthy couple known for their celebrity-like looks decide to give each other a “cheating prevention vaccine” before getting married: a temporary break to date other people and eliminate any lingering regrets. But what begins as a way to secure their future together may end up changing everything.
TVING

Jung Hae-in
Ha Do-woon

Shin Sae-kyeong
Kang Chae-rin

Jo Yuri
Lim Mi-ah

Kim Dong-hwi
Woo Dong-seok