The story is nice and truly realistic. For sure way more realistic than the stories on which are based the 90% of the k-dramas available for the vision, which I find sometimes too much conventional and over-filtered in terms of contents and topics.
That said, I can understand who does not feeel comfortable in watching the show because feeling irritated by some of the characters, but that's it reality. You can make a choice: watching a k-drama because looking for a fairy tale or watching something more real life related, where (surprise!) people is just normal people: can be fragile, boring, messed up, idiot, brilliant. But just normal people. And, in our case, just youths witht their cumbersome luggage for the life filled with fear, enthusiasm, uncertainty, youthness.
Han So-hee perfectly suited for her role. I like her way to act. I'm less positive for Song Kang, instead. Sometimes he looks too much stunned. I liked also the supporting roles and the fact that (very likely because based on a webtoon) sex and thorny topics like homosexuality were included in the show. (Yeah: they're part of the real life too). Very nice the OST