This is a very good slice-of-life manhwa. I think the reason it isn't read often is because it's a manhwa (of which most little else is scanlated except HMR) and the translation is not the best. Though I myself was not tempted to drop it upon reading the first chapter (which, thanks to the rocky translations, made little sense), I think many would be, especially if they are not used to the more mature slice-of-life genre, which is more philosophical and far less fluffy and the sister shoujo slice-of-life genre. However, despite this complaint about translation, I am really grateful to the translator despite her admittedly terrible English grammar. I can only read Japanese, not Korean.
Moving on the actual story, it's woven in such a way that makes the mood thoughtfully deep yet light. The main character, though others see her as immature (and she is at times, but she acknowledges it), is actually quite mature in her thoughts, which is very interesting when contrasted with the outward maturity of the characters of her best friend and sunbae (senpai). It's somewhat ironic how her motives are often more "mature" than the other mature characters, yet when she does make immature actions, she acknowledges them and finds herself at fault for the negative emotion. Overall, she's a very relateable character, and not annoying in the slightest. Her emotions are understandable, and in that, she becomes a likable character.
The two main side characters at the moment, her new closest friend and the sunbae are actually multi-dimensional like the main character, a fact which makes me incredibly pleased. They help bring a different perspective to the work, despite the reader not being able to hear their thoughts. Their humor alone makes his manhwa a definite read for me. Their interactions make this manhwa something I will re-read because they are not only humorous (though more mature in nature), but also insightful.
I don't think I could praise this manhwa more, because despite the shaky translation in many parts, the main messages and questions were still able to come across, and I found myself pleased and in a thoughtful mood similar to that of the main character.
Like PrincessVera, I would say the progression of events is natural, and quite characteristic of the josei slice-of-life manga. As far as romance goes, I'm fine with what the author has given me, and I don't think I'd particularly care who ends up with whom, if definite pairings even end up occurring. This manga is very true-to-life, and in that aspect, extra romance just to satisfy romantics would seem overdone and awkwardly cliche.
Overall, I'd say the character development/interaction in additional to the thoughts (of the main character) and dialogue are the best aspects of the manga. The paneling is not necessarily the best (it's actually kind of awkward), but the entire piece flows relatively well, so I think anybody who is a fan of the genre should try it.
Or really, anyone who doesn't mind a manga built all around the thoughts of one girl who is far more insightful than people give her credit for. Each progression is built around a flash of insight, which further emphasizes the fact that awareness is not immediate. The acting theme, I think, was relatively well done, despite the fact that many parts were difficult to understand because of the translation.