Time Travel: Super Internet Cafe System in Another World

The plot is very familiar, can you copy it? 🤫 I hope that the protagonist is invincible within the scope of the Internet cafe. It will be ugly if other cats and dogs come to try to control him. Don't use some system mines or robots given by the system. This will make the protagonist look stupid. There are also customers who have learned something. Write about how they can use it when they encounter difficulties. Don't just write about playing the game and what you got. What's the use of just getting it without using it?