"Succubus Disease." An evil disease rampant on this continent. The holy beings who possess the power to quell this disease are called "Exosisters." Aria, a novice Exosister who has sworn an oath with her mission in mind, sets out on a journey to the distant Great Temple to eradicate the Succubus Disease.

"I will become an Exosister and save people from the Succubus Disease!"

Aria, who bears the "Stigmata," a testament to God's blessing, heals and saves infected people who have turned into monsters with the sacred power of her body. This act is purely treatment. Even if she gains pleasure, even if her bountiful breasts sway and her voluptuous buttocks bounce, even if Aria's face melts into ecstasy, it is, after all, a sacred act. Do your best, Aria. To eradicate the Succubus Disease, go wild and have lots of sex!

My mission is to save infected people who have turned into monsters with the "Stigmata," a testament to God's blessing, and its sacred power! Aah, aah... This sacred act (SEX) is... Of course, it's to eradicate the Succubus Disease.