I'm a Villain, so I'm Not Too Close to Being a Brother to the Protagonist, Right?

Lu Chen traveled to a fantasy world in an unfinished novel and became a villain, the Son of God. Faced with the coming villain system, he resolutely chose to reject it and replace the system. Just because the enemy at the end of the story is too powerful. Fortunately, the system of Return is very powerful. As long as you help the protagonist get opportunities, you will be rewarded a hundred times. The protagonist has no chance? Lu Chen, help me find it! The protagonist has no enemies? Lu Chen helps to stir up hatred! The protagonist doesn't have a wife? That doesn't matter, because it's all with Lu Chen. Until a hundred years later, they faced threats from outside the territory. The fairy world and the three thousand worlds were invaded one after another. The divine voice of Brahma suddenly came from a certain small world. "I have a sword that can defeat monsters!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.