In Another World with a System.

The system. Created by the all powerful Interstellar to be gifted to the lucky other worlders and people who originate from Akidna.

The had created many models of the system. Some are just basic, focused on leveling up. Others are focused on a specific race.

Interstellar sometimes uses the system to force other into doing tasks for him. And Klyde was a victim of this.

The world of Akidna was starting to bore him and he was getting annoyed that no one had tried to free Erina. So he decided to curse… I mean, gift Klyde with the system, and then gave him the quest of conquering Erina and hoped that he would actually do something with the god-damned island.