Can You Save the World by Playing a Game?

In reality, I have endless wealth, and in the game I finally become the sole overlord! And all this actually happened to a handsome young man who was only 20 years old... What will this experience be like? This book is a novel about a male protagonist composed of 60% online games + 30% fantasy + 10% urban content. Naturally, there are many confidants around the protagonist, and he would mind if he accidentally falls in...