Breaking Up with the Male Lead

The heroine is a romance-novel-obsessed writer who's never even dated. After an electric shock, she gets isekai'd into the villainess of her own novel, and since she knows the ending she tries to change it, she calls off the engagement and enters a contract marriage with the male lead's older brother, agreeing to divorce in two years... It's a novel-transmigration story so the clichés are all familiar, but I watched it for Lee Hae-won's performance. Never got boring, 75 episodes and I had a great time ^^