Immortal - Volume 1 Chapter 20

After accidentally falling, she actually finds herself bound to a Second Female Lead Counter Attacking System!

Demons are rampant, the court is corrupt, the human race is declining, demons are rampant, and the world is treacherous and haunted.

Martial arts masters are just more delicious blood food in front of monsters.

There has never been a savior in this world!

My name is Jiang Heng, and I am the one who runs amok!

- Description from novelbuddy

Zoryn spent twenty-two years living as Daeleon’s son—her father's pride and joy—until her first heat exposed the truth... she was a woman!In the Beastworld, females are almost extinct.So when Zoryn’s hidden power awakens at the Grand Festival, her Heat calls every tribe’s strongest male:Wolves circle.Lions challenge.Serpents obsess.Avians tremble.Bears soften.But one reaches her first—Zarenien, the last-born dragon, fated protector of the Matriarch's line.Chosen by the beasts.Claimed by the dragon.And when an ancient, forgotten tribe stirs against Zoryn’s return, six beastmen and one dragon must put aside instinct and rivalry—or lose their Empress forever.

There are a total of seven sins, and a revelation is made to a young man named Alex that he is destined to become a demon lord, more especially a demon lord of sin called LUST.

It's not like he can change that and because he always knew something about himself was different—not in a physical sense, well, maybe a little—and not in a mental sense—but rather because he is thrown into a demonic war that compels him to accept his new reality.

He was only aware of a difference in himself. Relating to him and the ladies who are drawn to him... Well, it was more or less like he was a magnet in front of all the girls, and all the girls were drawn to him like a metal.