There is a simulation in a computer running a test on a world that someone created. During this test, a rogue programmer broke into the game and forced the game to give and NPC a System in this game world.

The story follows Rhune, one of the NPC in the game gifted this system that allows him to drain Data (magic) from things in this world, but it also allows him to hack and edit the Data.

Real people from our world will enter the game, but not all of them will like Rhune, and some may think that he is just another challenge to be taken down.

Waking up with a strange voice in his head, and a hacking system gifted to him, Rhune, a magicless Castless has his life turned upside down. In this Game World, people have assumed that not gathering magical energy makes you worthless.

Rhune has suffered under this hand of oppression. After receiving his system randomly and meeting a vicious cute little blonde princess, his world changes.

"Shall I take care of this world, or shall I take it?"