I am trying to find a drama that I have already watched but can't remember which one it is. I feel like it is a cdrama, but if I'm wrong it will definitely be a kdrama.

So the plot I remember is from the last episode. The ML leaves everyone and disappears (for reasons I don't remember but maybe for healing purpose?). The FL keeps waiting for him. How they get back together is the FL records some video of her (probably talking to/ or about the ML) and when she turns she notices the ML standing behind her in the video and they finally reunite. This is all I remember! Sorry for not giving more details :(