Traveler's Game price comparison

You are Camus Chen. Yesterday you received a video mail from your friend Lu. He thinks you have too few friends and recommends you a popular game:
『This is a battle game but many people use it as a chat room』
Lu told you so.

You decided to join your friends in this game to meet new opponents and chat with them while playing against them. Lu wants you to chill.

But what you didn't expect is that some of your opponents will have a connection to your life in the future. One of them will even learn the great secret behind you and your friends...