I Became a Level -99 Vicious Lord - Chapter 266:

On a drowsy night, I stumbled upon the princess's secret side.But what began as a chance encounter soon spirals into a dangerous and intoxicating game of desire, secrecy, and power. The story follows Eldric, a low-ranking palace guard, whose routine night patrol is forever changed when he discovers Princess Elena indulging in her most private, forbidden pleasures. Far from the image of a distant, pure royal, Elena reveals herself to be bold, mischievous, and insatiably curious about the world outside her gilded cage.Drawn into Elena’s clandestine world, Eldric finds himself caught between fear and fascination. Each secret meeting pushes the boundaries further, as the princess demands new forms of submission and intimacy, both as a means of escape from her royal duties and as a way to explore her own identity. Their relationship evolves from awkward encounters in moonlit gardens to passionate, risky trysts behind locked doors, where Elena’s authority and vulnerability are laid bareFantasy | Harem | SMUT | R18 | Elves | MILF | Romance

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

A master assassin transmigrates into an interstellar era.

“Ride this, my beloved consort!” Instantly rewarded with a punch in his charming face. He looked hurt, “I just wanted you to try out the mythical beast mount!”