Hatsujou Exorcist! ~Harau to Hatsujou Suru Ojou-sama ni Tsukaetemasu.~

Veteran doujin soft circle Lilith presents their latest masterpiece, a story of the occult featuring a chocolate-skinned heroine and relentlessly busty cast from the pen of reknowned ero artist Kohaku Sumeragi. The game's title literally means "arousal exorcist", and the story centers around the female exorcist tasked with banishing the demons of sexual lust from both male and female characters wtihin the story (the other females as 'lust demons' preying on the male proxy). An "arousal gauge" makes the unique element of the game system, altering based on choices you make and effecting the outcomes of the "H" scenes as you play through them.

[From J-List]