Like if you just come across a song from the ost of a drama on YouTube and like it without having watching that drama yet. Then you decide to watch a drama because of that song. But while watching the drama, you end up dropping it or disliking it at the end. Maybe you read the synopsis of the drama and settle to not even watch it at all but like the song of the drama. 

Does this happen to any of you? 

Yes, somehow. My example: I like the song "gaho - Running". The song is from the drama "Start-up", but I have not seen it and the synopsis of the drama was not appealing enough for me to watch it...

Not weird AT ALL.  It happens a lot