Only Up to Two Loves Are Allowed - S1.E1

Woo-jin and Samuel used to be deeply in love and very passionate about each other. However, after being married for a long time, the days of burning with sexual desire are long gone, and they become a sexless couple. One day, Samuel finds out his friend, Jung-soo, is having an affair. Woo-jin insists on telling Se-yeon about the truth.