Seikon's Aria

In a world where the "Succubus Disease" has spread, people are losing control of their lust and transforming into monsters. The only way to cure the disease is through repeated sexual intercourse. Aria, a young woman, was attacked by a succubus-infected individual as a child, but was saved by a former exorcist nun. Ten years later, Aria has grown determined to rescue those affected and decides to become an exorcist nun herself, taking on the task of confronting the spreading Succubus Disease. As she delves deeper into the world of exorcism, Aria must navigate the complexities of her newfound faith and the consequences of her actions.