Favoring a Concubine and Casting Aside His Wife? Then I’ll Marry the Regent, So Why Are You Panicking?

[Smart heroine + both untouched + exclusive devotion + hidden origins + secret identity + no saintly martyrdom] Su Wantang died a miserable death in her previous life. Her adoptive parents bled her dry, while her scumbag boyfriend and younger sister conspired to murder her. Given another life, she sleeps with the regent from the start to get the antidote, then runs off without taking responsibility! After the regent finds her, however, His Highness has already started looking at her differently. Now that she has a second chance, she will fight back at any cost. She won't be a caged bird. She'll be an eagle taking flight. By the way, why does that prince keep chasing after her? She can't shake him off!