Transmigrating as an Extra, But the Heroine Has Regressed?! - Chapter 69: The Skill of Madness.

This is a story about Gong Lixin who was the young master of an ancient underground palace in the ancient times. He was raised by his master and forced to partake sexual relationships with numerous people to cultivate his Yin Body. His master who has a Yang Body was going to absorb him after he has reach a level to become stronger. MC refused and killed his master also dying at the same time. Then he transmigrated to the modern time and thinking he will enjoy peaceful life, the end of the world arrived.

The world that nurtured the civilization which reached the pinnacle of magic was on the verge of destruction.
The last survivor transmigrated to the past, when the magic civilization started growing, as countless mages were still fumbling their ways through the thorny paths of magic knowledge.
He, who came from the end of the magic era, aim to reach the pinnacle of magic.

- Description from Novelupdates

The genius pharmacist transmigrated into a pitiful farm girl’s body. Ignored by her own father, abused by her stepmother, and bullied by her stepbrothers. Her “twin” brother was given to distant relative and she went as the “extra” to live under someone else’s roof.

Luckily she possessed mad apothecary skills. Collecting herbs, plowing herb fields, formulating medicines and treating the ills, she refused to live an ordinary life as she slowly uncovered the truth of her real identify.

Inadvertently, she saved a dashing man who was in reality a big, bad wolf hiding under the skin of an innocent little puppy. He pulled out all his tricks: I have no other means to return your favor of saving my life. What say I repay you by marrying you?

- Description from Novelupdates

A huge guy is bawling his eyes out. In this day and age? Sure, maybe the world changed while I was away in that other place. I’m not some old-fashioned boomer.But what if that guy is clinging to my pant leg, sobbing and sniffling—And we’re not even acquaintances?Even in modern times, that’s just messed up. Ask any passing kid, they’d agree.So yeah, I shook my leg. He was gross and too close.“The hell’s wrong with you? Crying just ’cause you saw a ghost?” “N-no! I swear, it was really there! You didn’t see it!!”I let the disrespect slide. Barely. He was asking for help and still talking down to me just because I look young?Obviously, I’m not the one who lost his balls. He is.And yet… when I looked where he pointed—Something was there.I threw some coarse salt and looked again.He stared at me like I was insane, but I ignored it.…Yeah. Something was definitely there.It made eye contact.