Goblin Inc.

An ordinary office worker, Manager Oh, falls into the Demon Realm instead of making it to work. When he wakes up, he has become the lord of a goblin territory on the brink of destruction. To live, he must take. To survive, he must conquer. Armed with a salaryman’s grit, he sets out to overturn the balance of power in the Demon Realm. (Source: Naver, translated)