This is only drama, meaning no other genre mixed in here. Nothing special or interesting about movie. It is about one way of dying, where even our death may be ignored so much. It talks about bad emotions, bad relationships, bad thoughts, bad lifestyle. Something negative can overpower us just like in real life. Lesson is to take care of our well-being, in form of finding or fighting for balance, happiness, meaning, health, relationships, and all other aspects of life. There is nothing special, not much to see. Mystery is uncovered only for us at ending, but it is not so mysterious generally (in real life). I think that drama without other genre or at least some extremes is never gonna be a good drama.