Which modern romance novel had a male lead that was much older than the female lead?

I recommend "The Little Wife of the Rebirth Era" to you! The male protagonist of this novel solemnly stated,"This is a sweet favorite novel. It's one-on-one. It's not that the woman is strong. The female protagonist is not soft, but delicate. The male protagonist is a manly male silver!" Therefore, it met the requirements of a modern romance novel where the male and female leads were very old. In addition, four of the books have been completed, and the reviews are excellent. I guarantee that you will fall in love with it in one breath and can't stop! Muah ~