Where to start? I always love the production values of Korean dramas. They are the best. The leads are very appealing and have good chemistry. Like the other Korean BL dramas I've seen, this one is very timid about showing much affection on screen. We get a lot of long stares into each other's eyes. We sort of get a kiss at the end, but it's about as passionate as two dolls kissing. The plot is interesting but quickly overpowers the story of their relationship. Way too much time is wasted seeing Yeon Woo's POV transform from black and white to color. I think we see this in every episode and we got it after seeing it twice. The complicated plot about Monos and Probes makes this drama very dialogue heavy, usually through hearing voiceovers of the character's thoughts. Frankly, conflict of the Mono possibly killing his Probe, yet the Mono and Probe are sole mates who open up the world to each other, seems like a "no win" premise. On one hand you want these two to get together but if the end game is for one of them to die, why bother. So, sadly, I'm going to pass on the sequel because I have a feeling this will end up as a tragedy and there are more upbeat dramas to watch. The death of a same gender love interest is a tired cliche.