I think that people have to understand that not every story has to be full of endless drama and tension. Some stories are made to make it clear for you from the start that everything will proceed smoothly no matter what happens. Just like heavy drama isn't for some, no drama may also not be, but it doesn't mean the story is having flaws. There may be some depiction flaws in a very specific arch, but for the rest it's a story that is literally meant to be a "Mary Sue" story. It's on the shortened plot, it's hinted on chapter 1 and from there on, everything shows you every chapter that the only tension on the plot is lack of awareness to some info, and that it will eventually be sorted out.
I'm saying this because some people literally bash this manhwa because of that, when the story is just doing what it proposed itself to do - and well, most of the times. A story with low conflict like this has everything to mess up the structure and make every chapter a "every chapter is an individual short story" type of comic, with common characters, but it rathers manages to split the mini conflicts well into various chapters so there's a drive to read the next.