well they don't look similiar at all to other koreans, i guess you are not asian or Korean? Every person kinda…
I was living in Korea for many years and had K-bfs and friends they all look different I'm not talking about other ppl I'm talking about this drama casts acting as students . Every race has similarity due to their gene. BUT like make-up and closing, these days face surgery has it's own fashion (like lips flip and for Asians double eyelids and narrowing face etc.) there are type of faces that has became popular these days in Korea. I don't say such words about other K-dramas, clearly this one face shapes and look of the most of the actress/tors' playing as students are similar.
Great idea and story but it was weak in some part for example in training part . Also they tried to choose good looking actresses and actors but they had so similar looks (or maybe similar beauty surgeries) :D . When it comes to many characters in a story, they need at least to use different looks and appearance that it could be easier to distinguish them. :))
I watched until half of ep 4 but can't continue anymore. I wish someone else was director . ps: ep 4 It was raining, but she did not get wet even a drop . :)))
Celebrity 
Every race has similarity due to their gene. BUT like make-up and closing, these days face surgery has it's own fashion (like lips flip and for Asians double eyelids and narrowing face etc.) there are type of faces that has became popular these days in Korea. I don't say such words about other K-dramas, clearly this one face shapes and look of the most of the actress/tors' playing as students are similar.
Also they tried to choose good looking actresses and actors but they had so similar looks (or maybe similar beauty surgeries) :D . When it comes to many characters in a story, they need at least to use different looks and appearance that it could be easier to distinguish them. :))
ps: ep 4 It was raining, but she did not get wet even a drop . :)))