The ghost servant

Slow-paced story set in a non-fictional modern world about a group of good friends with semi-interesting lives finding an unusual cabin and a very strange person inside.

Eventually, the story describes a difficult and complicated situation about dealing with emotions, being isolated, marked as an outcast, fear of abandonment, strange coping responses, slowly building trust and other related stuff.

If you get into the story and start caring about the characters it might become a pretty emotionally demanding read.