My Best Friend's Game: Vengeance on the Devil.

Yu-ri falls in love with Jae-seop after going on Eun-woo's blind date, but she sets up Eun-woo to marry him due to unavoidable circumstances. On her first wedding anniversary, Eun-woo finds out about an affair between Jae-seop and Yu-ri, and even her new lover, Min-hyuk, turns out to be a stepbrother of her husband. Completely torn apart by lies and betrayals, Eun-woo puts bloody revenge in motion.