The plot of the work is nothing special, but it is "okay". Everything mentioned puts the manhwa in that position, but it also has some shortcomings.
The main negative point is the lack of development of many of the characters that are important to the plot. Some simply appear and die as if they were nothing, others (very important) stay several chapters and suddenly die too, without having the worthy recognition they deserved. Another very annoying flaw was the fact that the work started to get very "rushed" in the final stretch, and that was terrible because we all expected a worthy ending for the story and it turned out to be a bad ending, not because of what happened but the WAY it happened ( very fast without any development), mainly due to the fact that during the whole work there was a "subplot" of romance between the MC and Kana, but they didn't finish it in any way, it ended up being an "implicit" romance between them, something unfinished. The feeling that passes is that maybe there will be a continuation, there is a gap for that. But if it's not in the author's interest, at least make some special chapters showing and ending, once and for all, the lives of the protagonists after all. Then it will be a "masterpiece".
