What about this manhwa, other than that it's just one of the best comic books that I have the opportunity to read so far.

Once I pass the first few chapters which for my taste start slightly, but still allow us to admire the amber, dark and original style of this new universe, we are entitled to a story that is incredibly addictive.
Indeed, the seemingly ordinary scenario turns out to be of a completely different kind because the main objective of climbing the Tower takes a step back (while remaining ubiquitous), to become a backdrop on which the true story unfolds.
It is full of humor and rebound to the point that it manages to surprise the reader several times.
The almost total lack of information given to the reader as to the characters, which could be taken first and foremost as a weakness, turns out to be on the contrary a great scripting force. Each climbs the Tower, without really knowing what it is and what it contains.
The characters are very well developed and become very endearing because of their diverse personalities, forged by their past and determining their goal within the Tower.
Trials and battles are well worked but are not a goal in themselves because they are more often intended to serve the scenario, and not the opposite.