Upgrade Specialist in Another World - Chapter 19: The Time is Ripe, Infiltrate the Stronghold!

Eight Thousand Years after the Glassing of Earth, Terran Descent Humanity has largely become a post-scarcity society based on consent and enjoying life. With the discovery of another ancient race beyond the “Great Gulf”, events and history collide to draw the Terran Confederacy into war against a hundred million year old empire that has always won and believes it always will. With allies and enemies of multiple species, the Orion Galactic Arm Spur will be wracked by warfare the likes of which have not been seen. Cracked, harried, wounded, and damaged, Terran Descent Humanity willfully throws itself against the universe itself. “The universe hates you and will take away everything you love, laughing while it does so.” - Terran belief.

[ Warning: Mature content (R-18)]In a world where the strong is king and weak don't have any right to even raise their heads.Eric, a boy of humble origin, was beaten to half-death state and thrown into the Demon abyss.Luckily, he survived and even got a life-changing opportunity in the form of [Godly Devil System]However...“What? I'm a half devil and the most suitable path for me is of a Dual Cultivator?!”Join Eric as he rises from the bottom, breaks the societal norms, and create a place himself for the world.

Transmigrated in erotic game and having a lot of fun. A lot of R-18 chapter.