A Nine-Tailed White Fox Is My Wife From A Previous Life (Lily Futa)

Synopsis: 

Modern Era:

Ye Fenglin has known since she was young that she was different from other girls. During high school boarding, after a week of school had started, her roommate—who arrived late—actually climbed into her bed in the middle of the night…

Ancient Era:

Nine hundred years ago in the Great Qi Dynasty, the current Emperor’s tenth son (or rather, tenth daughter in disguise), Ye Qingxuan, was born with an exceptionally beautiful face. From afar, she looked even more delicate and charming than most young ladies. After she turned fifteen and established her own princely mansion, she accepted every suitor without refusal. Every night her back courtyard was filled with the sounds of endless revelry and sex. Yet after a full five years, not a single imperial grandson had been born. People privately whispered that the prince’s body had problems—that Heaven was deliberately making things difficult for her because her life had been too smooth. Another year passed, and Prince Lin, Ye Qingxuan, finally collapsed from exhaustion and illness.

At this moment, a young woman around the same age as the prince arrived at the gates of the princely mansion. She claimed to be a physician who could cure the prince’s condition. By now Ye Qingxuan was desperate and willing to try anything. Ignoring her attendants’ objections, she invited the girl inside.

As soon as the young woman entered the room, she said:

“Prince, do you still remember the little fox you saved back then?”
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(Note: The story may interweave both the ancient and modern timelines. I originally wrote more than twenty chapters, but the plot progressed too slowly and I wasn’t satisfied, so I rewrote everything without saving the old drafts. Since I’m already working full-time, I’ll write as I go and release chapters as they’re finished.)

Important note (though it’s a bit late):

From the synopsis, everyone should be able to tell—the ancient timeline is not a double-virgin story. The ancient timeline is not double clean. It is not double clean! Emphasized three times.