If you like an invincible main character, I strongly recommend Invincibility with a Question. The main character of this book unexpectedly obtained the hidden class [Overlord Body Swordsman] after entering the online game, and became invincible from then on. There was also "MMOs: Rampaging the World." The protagonist's imagination was limitless, and he multiplied his emotions in the game. The war was intense and very exciting. I hope you like my recommendation, Mwah ~😗