As a big fan of the first season, I anticipated this sequel the moment it was announced. Unfortunately, this season disappoints me to the point that I felt like they wasted a great opportunity to create a more distinct flow of story. Yoo Han has been kidnapped and this season focused on the MONOs desperation of wanting to see colors and undergo probe surgery, which was later on found out that it was an experimental procedure that resulted in the death of the MONOs who turn out to be the guinea pig without their knowledge. The victims of this test surgery include Se Hyun’s sister and Yeon Woo’s mother.

The story is confusing. Still love the concept but the execution was poorly done and feels like they're the only one who understands what's going on in the story. A bland and plain season, just like how MONOs can’t see a color without their probes.

Some flaws I can’t help but to question in the show are:

- How can they determine the outstanding employee of the quarter? They based it from what?
- The power of the main protagonist. Two teenagers managed to stop an adult scam facility, and fought against plenty of men who are older than them. How can they beat them all? Unbelievable.
- The two side-characters. How can a student interrupt and force a broadcast of certain news on national TV? Wow, what a skillful technique.
- Background music has been abruptly cut a few times. Hey, can’t we listen to nice music with a good timing of when to end it?
- The unacceptable appearance of the deceased sister to Yeon Woo’s dream. Do they have nothing more realistic to think about? Probe and Mono are a good fantasy but to shift into something incompatible to the concept is insignificant.
- The idiot guy who was on the run for the crime he did but still chose to cut into a broadcasting event that led him to be arrested. Please, this scene was so funny! No more ideas? I can buy a classic scene but not this one.
- Lastly, the action scene was not suited for the main character. Hey, he is so cute throwing his punches like that. He fits the adorable role better than a student who is good at fighting.

To be honest, I supposedly gave this a much lower score but Kim Se Hyun was just so enchanting and appealing that I felt sad and decided to adjust my score a little higher. Hyuk was a good addition to the show. As Yeon Woo says to himself, Se Hyun is so cute and lovely. His pouty lips want me to see him kiss Yeon Woo so much hahaha but I’m still salty to witness a dream-kissing-scene without seeing their lips touch each other. Anyway, I also wanted that forehead kiss as a gift coming from Se Hyun hahaha.

Yeon Woo has two boys who love him now. One is his probe and the other one is a MONO just like him. Despite the disappointment I felt this season, I want to see another season with Yoo Han’s comeback. The ending gives us a hint already so it is possible to become a reality.

Good enough for a continuation but can be carried out more than good.