Out of curiosity, what mystery do you think was solved? imo, this chapter only resulted in more questions randomness
I think by mystery they mean Guwon knowing about the coup d'etat & his reaction to it. Maybe they were expecting Guwon to be clueless for longer and/or for Guwons "reaction"/response to be a couple of chapters long.
Was hoping the mystery to last a bit longer to build tension tbh.