Reijoku no Ikusamiko

Iori, a shrine maiden of the Todo clan, was raised apart from her twin sister Sakuya. When a once-in-a-century calamity strikes, she confronts it but is overpowered by a Great Oni, who brands her with a cursed seal. Her body is wracked by relentless carnal fire, and her spiritual energy begins to pour forth uncontrollably.

Unable to confess her shame to anyone, Iori's despair deepens when the Great Oni reappears, seeking the potent spiritual power held by the shrine maidens. Gathering her courage, she crafts a daring stratagem and manages to wound the demon general. Clinging to the hope that her sister will come to exorcise him, Iori fights to withstand the Oni's onslaught, teetering on the brink of ecstasy. But when the demon's virile form finally breaches her defenses, her resolve shatters in a flood of forbidden pleasure, just as Sakuya appears before her.