Japanese or Korean film, probably a feature but possibly a short, colour, most likely shot between 2000 – 2015.  A couple (man and woman) move to an apartment and start to hear banging on a wall at the same time every night which is a portent because eventually they hang themselves from the ceiling and their bodies swing against the wall, making the banging noise that they had repeatedly heard.  Have looked online for this film for ages and just can’t find it.  I love Asian horror so am annoyed that I can’t remember!  Thanks for any help  🙂