A Trick and a Treat: Dead Letters (And One Other)

About

A Trick and a Treat is a Halloween visual novel featuring two stories: Dead Letters, a horror story in which a man working at the post office opens a letter and learns of something he shouldn't have; and Vamp Me!, a comedic story in which a woman comes home from a Halloween party to see her roommate in the midst of performing a ritual in their living room.

Source: IGDB