My Guide to the End of the World Game

What's the secret to beating the game the fastest? Keen awareness? Skilled operation? Or perseverance? How could it be these? Of course, it is easiest and fastest to skip classes and pass the level by directly searching for the guide! What? You say this is a real world that can only be cleared in one life? Su Xuan couldn't help but burst into tears of excitement when he talked about his experience...