They have very different plots but the main elements and sort of development of both of these dramas are similar. This is because:

· They are by the same screenplay writer.
· The female lead is far away from her home.
· The female lead hides some things about herself from the male lead.
· The male lead at first appears to be standoffish and not caring but is actually trying to help the female lead feel comfortable and help.
· The male lead is from an influential/wealthy background and female lead does not know.
· The male lead is usually introverted and not interested in others but is sweet and caring with the female lead.

If you liked Crash Landing on You I recommend watching Legend of the Blue Sea.