When I watched Crash Landing on You, the Arsenal Military Academy drama (Chinese drama) came to my mind due to the military environment and even the people dressed up in both dramas are almost in the same way although the dramas are in different eras.
Both dramas are also different in language and story line but the dramas would be totally giving the same kind of romcom despite of the conflicts they are having.

Arsenal Military Academy is a Chinese military drama but it's very easy to understand their story line. It's a gender bender drama whereby the main actress had to disguise herself as a man in order to replace her brother in the military. I really do love gender bender drama and if you do too, then you should give this drama a shot too!^0^