God-Tier Extra's Ultimate Guide

The main character, Kim Gyeong-Sam, is an orphan who is preparing for the civil service exam while working part-time at a convenience store. While engrossed in playing the game 'God Forsaken World' and playing out the scenario of 'Gilosan Ello D'Baltic', the fallen Third Prince of the Empire, he was transmigrated into that character. The worst part was that by the time that happened, the fallen Third Prince, better known as the 'Prince Pig', had been kidnapped and was on the verge of execution…! 
We will see how Gyeong-Sam uses his knowledge of the game 'God Forsaken World' to overcome various crises.
(Source: KakaoPage, translated)