Hey there,
a while ago I was watching an asian movie on youtube (I think it was korean with eng sub). It was very sweet in the beginning. The plot was about a girl falling in love with a police officer. The ML seemed not interested or shy at first but turned out to be a freakin psycho! He suddely kept the girl from leaving the flat, chained her up and made the neighbours think she was crazy. That part reminded me a lot about the movie "midnight".
If you recognise the movie, please let me know.
If you know similar movies, please also suggest. They don't have to be korean but can be any, but asian movies are preferred ;)
Thanks a lot!