I really, really like this overall. The setting isn't anything too special, but what makes it great is that it allows side characters to really develop and have major roles. Some good stuff right there!
The main character herself is an absolute gem as well. Mostly well written, with the exception of that one caveat mentioned in the title.
Speaking of, I'll mention it here. The caveat is, as is usual for a manwha, the romance and the ML... This is one of those that really should not have been a romance to begin with. There is almost 0 romance until the last 5 chapters or so. And no, I'm not exaggerating. And despite this fact, its painfully obvious who the ML is supposed to be the first time he appears (around chapter 30-40?). In addition to this, the ML has two, TWO, appearances before the last few chapters. There is NO time for any romance to develop, nor is the ML anything more than a bunch of cliches. Presumably this is due to the author not having time to develop him, so they just made him as cliche as can be so the readers know he's the ML... Added to this, he is one of the as I like to call them, "genie MLs". As in, he appears, seems to know everything, gives FL a hint or solves a problem for her, then disappears. I can't stand the kind...
Would probably have rated this 8.5, maybe even 9, if it wasn't for the caveat. But such is life.