Hmm...

I temporarily had no idea how to write the side story.

Let's roast Tang San first.

Mainly because...

I forgot what level the protagonist was during the tournament.

Most likely Three-Ring.

But...

It's tricky.

Let me think about it some more.

As for this side story, it's purely to roast Tang San, so you can skip it.

Also, about that Golden Tree...

Essentially, part of the system merged into it.

The system didn't die.

At least, it didn't die completely.

I won't say much more about that.