You Cheated First. Why Are You Crying Now That I've Remarried?

They Never Slept Together in Three Years of Marriage. She Asked for a Divorce, and He Agreed

At the beginning, the female lead has been married for three years, but she and her husband have never shared a bed. She’s the only one in love with him, but even after three years, his feelings haven’t changed. When she hears that the woman he loved in his youth has returned, she asks for a divorce. He agrees, and she quits her job and goes back to her hometown.