The Ugly Love of Monster Girls - Chapter 8: Beast Beneath the Skin

Waking up in the body of a 6-year-old boy a few years before Cintra is destroyed, Madara receives a system that gives him the ability to gain the powers of Uchiha Madara.[The peak of Uchiha Madara's system is before he becomes the ten-tails jinchuuriki.]The system's percentage does not stop Madara's power, but rather the system's release. After all, I don't want to see a character who goes around killing everyone from the beginning of the story.

In a world teeming with mythical races—dragons, vampires, elves, and more—Pyris Obsidian finds himself reborn as the Champion of Lilith, the Goddess of Lust. Armed with her divine blessings and an ancient Obsidian bloodline, Pyris is thrust into a deadly world where power is the only currency, and ambition can turn men into gods—or their prey. The empires of Argos teeter on the brink of chaos, with Immortals lurking in the shadows, and gods watching from above, waiting for mortals to fall. As Pyris rises, so does his influence over the magical world, manipulating power, desire, and even reality itself. But the gods and their champions won’t stand idle while a new force of lust and dominance rises. With forbidden magic, unparalleled charm, and an insatiable hunger for conquest, Pyris must navigate treacherous alliances, deceitful enemies, and seductive allies, all while keeping the truth of his destiny hidden. For in this world, desire is power, and Pyris will stop at nothing to claim what is his—even if it means defying the gods themselves. Will Pyris bend the world to his will, or will the forces of the divine bring him to his knees? Only time will tell, as he embarks on a journey of lust, magic, and unrivaled ambition.

Jiang Bai woke up one day and found with shock that he had transmigrated to a parallel world that is similar to Earth. There, he was granted a cheat system to help him forge the path of a tyrant in this new world. He was now stuck in this parallel world body, the body of a weak and cowardly person. Join Jiang Bai as he rose to the top in this new world!

- Description from Novelupdates

The first part is finished, and the second part is starting. Two worlds of immortals and demons, and the boundless universe. This decides the tone of the second part!