Rebirth System: Blood and Ash - Chapter 25: Home of Sinners

Ishiki grew up staring at the Floating Cities — a distant paradise in the sky that gave humanity both hope and despair.And then, they fell.Not just one, but all of them.The heavens burned and with them the world crumbled, the Apocalypse descended upon mankind.Ishiki never wanted to be a hero, nor a savior. He was just glad to be alive.Until the Neural Matrix System chose him.As he was dying a Window appeared in front of him.[Congratulations You have been choosen as a Player]He was dragged into his first trial in the world of NEXUS. And he soon realized, he was destined to die there too.But he survived.Survival offered him the a Mythical Title... a power that came with ways to make his life more miserable.

She, a 21st century mercenary queen, had crossed over into a tragically betrayed body of a waste. Waste? She will show them what it means to be a waste! Betrayed? With the Ancient Manual in her hands, she will astonish all the despicable men and cheap women!

Wait! Didn’t everyone say that she was an evil woman which everyone feared? Why is his Third Highness, full of mystery and charisma, so interested in her?

- Description from Novelupdates

In a world ruled by ten royal families, Saruto was born into the Lewin family (the Dark family). He grew up carrying a promise he made to himself with his mother's last breath: to become the pride of the Lewin family (the Dark family). He is compelled to acquire power to help him achieve his goal. In his quest for power, he begins to uncover the origin of the Dark Power that suddenly appeared in his world without warning. He realizes that his family's history is deeper than he thought. How will he discover his family's history, and will he be able to fulfill his promise to his mother to become the pride of the Lewin family (the Dark family)?

As a man who had lived for 20 something years and had always considered himself as a straight man, he woke up one day and found himself possessed by a stupid and cute system. Moreover, it was a gong-shou cultivating system?! Let’s see how a shou with raised hackles evolves into a (pseudo)queen shou, incidentally with a story of a hidden loyal dog gong.

- Description from Novelupdates