Sinful Catalyst is a visual novel with puzzle components.It tells the story of Gyulia, an exorcist who wakes up disoriented in the dark forest (entrance to the underworld) and during his adventure he will meet Lilith, a succubus who knows him even though he does not remember her, during this adventure we will know how the relationship progresses of these two characters who will be involved in quite erotic situations.Enjoy and discover the dark and lustful secrets that the underworld keeps for you.