In a few songs I've heard recently I've noticed that なんです(nan desu) (without the か) has been used in what seems to be maybe a declarative or emphatic sense (not really sure), is this possible?
I'm not overly familiar with usage of nan desu outside of it being used in the question sense (i.e. なんですか nan desu ka). If someone could clarify uses of nan desu I would be super appreciative.