Transmigrate Into Legend

[Fast-paced, transmigration across multiple worlds, System.]

Please read Chapter 4 first. I forgot to include the original synopsis, so I added it there.

A young man who came to another world of his own accord gets the standard-issue System. How will he rise to the top of life?

But he never expected to discover along the way that this world was just another cage, and only those above it were allowed to know the truth.

One cage after another plunges countless worlds into darkness.

Are you willing to destroy it all?