This drama is a Korean BL, and by that, we all know what it means - it's simple, the acting is mostly okay, but it has technical problems and script inconsistencies. It's no surprise that this drama became popular; it was fun to watch. The plot is really creative, and you will have a good time watching it if you can ignore some plot holes (that honestly are so small they become unimportant) and the awful pace and cuts.

The major problem with the script is how inconsistent the characters are. Myungha is the only character that, I believe, the writers put some effort into. Sangwon is a plot device, and so is Yeowoon. They both change personalities based on Myungha's conflicts. Sangwon feels like an NPC, not the main love interest. And then there are the siblings. What's the point of them, exactly? What did they even add to the story? For the girl, is she just the quota female character? (something that always annoys me in BL because most of the time they create a female character only for the sake of a female character, and they NEVER give them any development, or they are just annoyingly obsessed with the main character).
The characters were just lazily created. At least Sangwon should have more of a personality, but following the BL recipe, he went from "I don't like you, and I don't like people" to "obsessed with you, I will do anything you want" really quickly. His character is incredibly boring.

After saying all that, people will probably be angry already (because the drama is popular and I bet people will get angry), but wondering what's with the high score I gave this show. First: it was good, like I said, for a Korean BL. We don't have a lot of interesting things in the KBL industry. Second: fantasy is always fun to me, and the high school setting is good (so we can justify some actions as "they can be annoying because they are still teenagers").

The story also had some lessons about loving yourself that, again, is only about Myungha. He was the only character with real development. It gave some RuPaul's "if you don't love yourself, how the hell you gonna love somebody else." It also mentioned about finding happiness in a simple things (but the whole plot was nothing but simple, come on. He was made to play a game, and the other guy falling in love with him was literally his mission).

I believe if the characters were better written, this show could become Korea's best. At this point, after so many examples of it, the KBL industry should realize that people don't want the cold CEO character type and their dumb naive bottom; people want relatable characters like Myungha.