The short: Its good. Great for a Solo Leveling/ToG crossover. There are some gripes, but those are mainly personal. I say if you like ToG or Solo Leveling, it’s a must read. (4.0)
The Long:
Writing Quality - 5/5 - It’s great quality of work. The author has put some time and effort into this, and it shows. The only thing that sticks out to me is the fact that sometimes thoughts are a bit unclear, but that’s probably a stylistic choice. There are some minor mistakes, but nothing that distracts from the story. I don’t necessarily like 3rd person omniscient. However, the author does it fairly well. (If I had to recommend anything, it’s that you don’t need to include Jinwoo’s status after each chapter.)
Updating Stability - 4/5 - Honestly, I’m not too picky about this. The chapters are a bit far in between, but it’s nothing too bad.
Story Development - 4/5 - This one was a bit hard for me to judge. On one hand, the story is quite quick paced. That’s not necessarily a bad thing, and the author handles it okay, assuming he is just trying to get on with the story. However, it feels a bit stale. The reactions, powerups and emotions just seem a bit stunted by a faster plot. It’s not to say there are bad scenes, just a bit rushed in my opinion. (Not much to recommend. You’re doing fairly well, and the character interactions are done pretty well, too.)
Character Design - 3/5 - As stated above, the story is fast paced. This can directly hinder character development, and while the characters aren’t bland and emotionless, they aren’t really developed. Of course, it’s probably too soon to judge, so I won’t say anything more.
World Background - 4/5 - Well, it’s a world that was already built, but the author is doing a good job at slowly introducing everything. There are some minor things that feel off, but nothing too distracting.