The story in itself is promising but the execution is a bit messy.
Three episodes in and there are pieces of the plot I wished were more installed and others I wished we'd discover later in the story to keep things fresh and make us feel like everything is planned out.
I'd have enjoyed the idea of a very present threat, of a curse every student believes in, to create a real tense and heavy atmosphere. As for Dika, I'd have liked it better if he was introduced a bit later, thus making Ayan look even more mysterious since we don't know his true motives.

A lot of things are put out there and it creates a bit of a messy development: the curse is mentioned but it's hard to know if students strongly believe in it or only think of it as a kind of joke or unrealistic threat, Ayan's uncle has come into the picture thus revealing Ayan's presence in Suppalo, Khan and Thua's relationship is unclear too since they both give each other the cold shoulder but at the same time, they seem to care about each other... and how can a powerful and elite school like Suppalo feel threatened by three students who aren't even that rebellious (they're only shown once or twice with casual clothes in school and end up complying with the rules even though they dislike it!)?
I think the further we go in the story, the more everything comes into place but it's a bit of a shame that the title of the series and its premise feel like it's just a mere detail of the story.

Of course, I do enjoy the "cat and mouse game" between Akk and Ayan. One teases the other, consequently, the other gets flustered... it's cute and quite well-executed (though it drags on for a long time). Akk and Ayan's actors have nice facial expressions and lively eyes.
I think Khan and Thua's relationship evolves nicely too (that scene when they're sleeping next to each other and Khan's owning up to his feelings...absolutely adorable!). It's a good thing that they've changed the dynamics they had in Fish upon the Sky, this way, it doesn't bring a sense of deja-vu.
Dika's story is, in my opinion, what is the most interesting aspect of the plot, and I found myself looking forward to knowing more about it while the curse is just a plot device that is not well used (at least at the beginning of the drama, the "mystery" behind the curse unfolds later and gets clearer).

Some dialogues and some scenes feel a bit stiff, nothing too cringy but there are silences that drag on weirdly between two sentences or the way the dialogues are delivered is not very natural with some actors.

No matter my criticisms, I've not dropped this series and it was a rather pleasant drama to watch!