Naruto System in One Piece - Chapter 113

A mortal youth accidentally stumbled upon the path of immortality and struggled to move forward on the arduous journey of seeking immortality.The road to immortality is more difficult than reaching the heavens, yet despite the countless obstacles, his determination to pursue immortality remained unwavering.Looking back, the green mountains still stood, but his old companions had all turned to bones.

“A cheat system? Do you take me for a fool? Nowadays, where can you find such a good thing falling into your lap? Scram from my head. Is this is new kind of fraud? Or is this a murderer training system of aliens that contains the ability of hypnotism?”

“No, I am the chaos that whispers from nothingness, the nightmare of all living beings in the Southern Ten Stars, the successor of the unparalleled God and… your elder sister.”

“…I only have a younger sister, I don’t have an elder sister!”

“No, you have one. I am an illegitimate daughter. It’s just that your dad didn’t inform you.”

- Description from Novelupdates

Lucius Lothra, a passionate gamer suddenly find not just himself but the whole world in a fantasy world where Knights and Mages exist.All Earthlings who once played a VR Game called System Online wake up in this world with their own Systems which they created when playing System Online. Lucius had just created an account when a world ending event occurred so he didn't play the game but he did manage to create his own system.The only problem that Lucius has is that he doesn't know if his system works or not and the only way to find out is... DEATH!!!

Li Li became a chubby, unremarkable tabby cat. Right after his Litter Shovel Officer broke up with his girlfriend, he received a Comprehensive Network slot and successfully became a Comprehensive Network player.However, it seems like his Litter Shovel Officers have encountered some trouble! This is a bit troublesome for him, but what can he do?He’s a good cat. Li Li took out a treasure from his pocket and tossed it:“Take it, Litter Shovel Officers. You have been strengthened.”