Your Highness, the Princess Consort Is Poisoning People Again

After transmigrating, she wakes up to discover she's been buried alive?

Lin Xi, a woman whose mastery of poison is unmatched, climbs out of her coffin, only to accidentally step on a poisoned, ancient-style handsome man.

"It'd be a shame to let someone this handsome die. I'd better save him."

The handsome man replies coldly, "Saving me just this once won't do. If you're going to save me, you'll have to do it for the rest of your life!"