The Villainess Remains Youthful

This is not a reincarnation/transmigration story.

It was like a romance novel. The male lead and heroine ended up together. Saphira Dumont, who was seen as the villainess by many, became bitter at first because the white lotus b*tch and her two-timing fiancé (now ex) betrayed her. But she decided not to wallow in her misery and to forget about them. Years later, she realized she was not aging, leaving scientists bewildered after they discovered she had a unique gene that kept her youthful. She was the only human with this gene and became famous. Soon, many people desired her blood to make themselves young.

*Cover art not mine*