Bound by Night is an adult Visual Novel set in the modern world with supernatural elements. It includes six core characters as well as five patron-sponsored characters, all of whom are romanceable. The story combines elements of the the psychological horror and erotic genres, with explicit sex scenes between men and dominant/submissive relationships that can evolve over the course of the story.

Bound by Night has its own mythology around the supernatural elements. It takes place in a world just like ours -- without magic -- but in which vampires and werewolves exist. Over the course of the story, the main character will learn how these creatures came to be and how much more dangerous they could become.