I don't really know how to appreciate your works but they are good. The writing isn't complex, very easy to read infact and since I've been reading books for a long time now, I put down such books without completing them. But I'd say you have potential to write more chilling stories.
'Bus rides' didn't thrilled me much but 'The mirror' was something!! The comments said they were confused whether Tae was fake or Kook even though you had mentioned at the end that he had schizophrenia. Before coming to the end, I was anticipating that it would be a ghost type horror story but once again I've realised mental illness are the real horror.
Keep writing <3