Arifureta Shokugyou de Sekai Saikyou (WN) - Chapter 339

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

Lu Sheng, who transmigrates to the Star Sea Era, unexpectedly acquires an attribute panel capable of solidifying every single advancement he makes.In this perilous world filled with alien gods, immortals, Mechanical Ascenders, and more, Lu Sheng relies on himself to progress from mortal flesh to the singular True Self.Years later...Lu Sheng flying across the universe, gazes upon the endless darkness at the edge of the cosmos, where a colossal being as vast as the Milky Way Galaxy—once recorded in mythologies of Blue Star—resides.He speaks faintly, “You might be the most formidable Galactic Life Form I’ve ever encountered. Calling you a god wouldn’t be unjustified.”“Yet it’s a pity, for I have already established the foundation of the Great Dao and forged the singular True Self. Henceforth... you may call me the Martial God!”

An otaku with a hobby of masturbating was reincarnated as the son of a great mage.

As soon as he was born in this life, he vowed with a goal of embracing women till his death.

That said, when he became 20 years old, the Demon Lord which was sealed by his ancestors revived, and now it is his role to seal it once again.

And that demon lord is sealed in a tower dungeon that is rumored to be impossible to capture.

However, by an unexpected coincidence, he had found out that the Demon Lord is also one of him, a kindred spirit from within,

so he joined her instead and filled several traps in the tower dungeon, and thus they enjoyed a s*x spree with all the women coming over!

First Senior Brother is a hopeless romantic, Second Senior Brother carries a deep-seated blood feud. Third Senior Sister is caught in a love-hate cycle with the Demon Lord across three lifetimes, and Fourth Senior Sister is a femme fatale.The Sect Leader left the sect for love, while the Martial Uncle fell into demonic cultivation for the woman he loved…Neither immortal nor heroic, just handsome men and beautiful women playing house.Only the Little Junior Brother is reliable, upholding the sect while dedicating himself to profound cultivation.The heavens stretch vast and mighty, my Dao shall prosper!With righteousness in his heart, grand ambitions, and the fate of the world as his responsibility—“Disciple Li Xuanxiao, requesting the Sect Leader to die!!”“……”The Empress: “Open your eyes and look at me. I don’t believe your eyes are truly empty.”Li Xuanxiao’s eyes widened like bronze bells.The Empress: “For you, I would rather bury the entire world with me.”Li Xuanxiao backhanded her with a slap: “What did the common people do to you?!”“…….”Blood Demon Patriarch: “Should evil truly deserve death?”Li Xuanxiao: “If you don’t die, then do I have to?! Hurry up and die!!”“……”By chance, he encounters a gravely injured demoness—stunningly beautiful.Li Xuanxiao: “Let’s see if my poison can’t kill you!!”“Take my sword and feel a thousand holes piercing through you!!”“…..”Li Xuanxiao transmigrated one day—no system, no chosen one destiny, only the relentless pursuit of immortality.But the sect is a bit unreliable.First Senior Brother constantly attempts su*cide because of unrequited love.Third Senior Sister brings the Demon Lord right into the sect.His master, stuck in puberty, ran away for love.Little Junior Sister is determined to seduce him.The Empress sees him as her dream lover.