This is drama is entertaining to watch, but there were so many holes in the logic behind this drama. It's supposed to be based around an Augmented Reality (AR) game that is played with some lenses that this big tech company sells. This implies that the series is gonna be a Science Fiction series, but around 3 or 4 episodes in you really have to give up on the idea that this is a Sci-Fi series and just think of it as a Fantasy series.

Without giving any spoilers, one of the logic holes is that in this AR game you fight with swords, and you can fight Non-Player Characters (NPCs) with your sword on the game. Well the only technology introduced in the drama was a set of lenses that transpose the game's graphics into the real world, but when a player fights with an NPC and the player's sword clashes with the NPC's sword, that collision of two virtual objects is felt by the player, i.e. its as if literally two physical swords clashed. What is the technology behind this? It is never explained or addressed.

If they had only said something like 'the lenses connect to the users cranial nerve system (CNS) and can simulate physical forces by sending signals to the CNS which will ultimately result in a real life-like experience for the users.' I would've been happy, sure the technology to achieve that hasn't been discovered, but its certainly plausible and feasible from a futuristic perspective, but none of that was ever approached by the drama.

There are other aspects in the drama which are simply not explained (which I won't enter into details so I don't spoil the story), but what's important is that up to the very end of the drama, the notion of this being a sci-fi drama is kept. At no point is it acknowledged that something impossible has happened, rather they call some of that stuff 'bugs' which is the computer science term for faults in the LOGIC of a PROGRAM which implies sci-fi, and yet nothing was ever explained.