Body switching between male & female...................................................................................

Both have a ML living a normal life & then have to learn to adjust their mental state + everyday life to deal with a newly acquired disability. Love will find a way to exist/survive.

Both have a FL that had her face disfigured, but still manage to find love.............................................

Both movies have a FL with a "particular set of skills" that make them dangerous & useful.............................................

Both have a ML character who is a young male prostitute working for $ to help a woman
(the young ML actors even kina look alike to me too - Dowoo /Kim Bum)

Both are survival audition programs intending to create boy band idols........................................................

Both are reality shows that utilize an elimination system to identify the musical skills of boys who want to become music idols. The comradery in I-land is so energizing.

Both are school dramas involving bulling & ML + FL being enemies that turn into lovers..............................................

Both have a FL vampire.....................................................................................................................................................

Both share a FL running an inn/boarding house, a ML who lost his father which causes him to hide his identity, & a family secret.

Both have a bodyguard character that would do anything for their assigned female client. The ML3 character in "Love of Replica" reminds me of the ML2 character in "The Last Empress."

The leads only have eyes for each other. Also the amount of sexual tension between those leads is high on the blush worthy scale.