The Tower of Trials—

a place where one could gain superhuman strength, floor by floor, step by step.

And then, there was the Tower of Ascension—

a domain reserved only for those who had already conquered the Tower of Trials, the veterans among veterans.

[This is the Tower of Ascension.]
When I realized I had entered the wrong tower because of a bug, I thought my end had come.

…Wait, I didn’t get this?

But strangely enough, no one seemed to know about the existence of the Hidden Piece.