I very much enjoyed the OST for this drama, but that's frankly the only aspect that stood out. Some quick hits...

[1] The background music was often times overly dramatic for what was actually happening during a scene and felt out of place in others. It cheapened the acting for me as it all seemed way too melodramatic to be taken seriously.
[2] The female lead is cliche and immature (from what I can gather in the first 12 episodes). It's such an overused theme in dramas to focus on the physical attractiveness of the male lead and this drama is no exception. You see the female lead remarking about how good looking the ML is and she further develops this weird obsession with him after learning he is blind. Moreover it was incredibly uncomfortable how she would invade his personal space, almost like she was TAKING ADVANTAGE of the fact that he is blind. She makes unwanted advances towards him, makes physical contact without his permission and let's not forget when she made a scene in public spinning up that ridiculous story of her being pregnant with his child and him cheating on her with her friend all for the sake of her not losing face.
[3] The ML is flat and uninteresting. You *could* take the stance that Evan plays the traumatised, reclusive and moody kid who grew up in an orphanage quite well, but nonetheless...
[4] For a character who allegedly is a psychology major, the FL makes questionable decisions and assumptions throughout the drama. She feels naive with an almost suffocating amount of optimism. Obviously she won't be able to empathize with the male lead, but there are many instances where she makes no point to understand his POV and almost invalidates what he is feeling.

All in all, a pretty subpar drama that isn't worth the time.