I Have an Arbitrary Door

If you could go back in time, what would you most like to do? If you could go to the future, what would you do? What would you do if you traveled to the second dimension, or even another dimension? You must want to say that there is no if in this world. In fact, I thought so at first, but after personal experience, I changed my view. There are some things in the world that you don't think would exist without them. Human beings have only existed for a few years and have only developed for a few years, and yet they are still trying to see through the whole world with a weak vision. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.