The Extra's Harem In Dead End Game - Chapter 26: Mylan Steak House [1]

“While playing a Tsukkur erotic game that I loved, I somehow became possessed. To make things worse, I transformed into a perverted kid—one of the villains from the NTR series.”

Betrayed by his former gang and thrown into the Rendhold Underprison, Dantes has spent the last five years scraping by. A whoreson of orcish, human, and elvish blood, he's lived on the periphery of the periphery, lying, cheating, and stealing to survive. After a run of bad luck, he's made a powerful enemy. Luckily, he's also gotten all the tools he needs to turn things around.A slow burn progression fantasy focused on rising through the criminal underworld of a city-state using newfound powers and quick wits.MC's powers will develop slowly, but he will use them in creative ways to get ahead, and in the meantime he's not above just braining someone with a club.Anti-hero/villainous MC with a code.

There is no master god, no system, no exchange, and some are just source codes that are fused in the mind to open up the world, not to be forced or suppressed, but to constantly go through in order to become powerful Look at my infinitely powerful source code …

- Description from uukanshu

After transcending to a new world, Ye Xuan miraculously obtained the Swallowing System.