Title: Love Phantom
Company: Love Gun
Format: 1 HDI image
Size: 2.03 MB Compressed
Game Type: Adventure
Adult Content: Nudity, Sex (Censored)

You are apparently two priests/exorcists, a girl and a guy. If there's a plot, it's pretty quickly obscured by the non-stop hentai. More or less a visual novel, I'm not sure if the plot actually branches.