There is a strong relationship between the main male leads in both dramas. In addition, their backgrounds are more or less the same which messes with their in-between dynamics.

Both include pets and both have a light romance with some cute moments. They also have idols as the main leads.

It doesn't have the same story, but it has the same vibes, with the neon colours and the bright lights. Also, it is about youth and achieving your dreams in the fashion industry

Both have the same vibes, a more slice of life approach to the story, as well as some grey characters that try hard to get by, while observing the lives of others and dreaming of getting a life like theirs. They both, in addition, have original cinematography and plots, as well as strong female leads.

Both are about two trained killers and the main characters are strong female leads. The genre is noir in both of the dramas and there is also a love interest who's an outsider

Both have a nice fantasy world about the afterlife and also the romance is pretty much similar.

They both have a serial killer that is an artist and wants to turn his killings into art, or connect them with his art.

Both deal with extreme cases of bullying that lead to tragic outcomes.

The main lead also has to confront his own demons.

They are both dark and have a shocking touch of reality.