Real Inside, Fake Outside - Spot the Shrine Maiden Disguised as a Succubus

Seven shrine maidens serving at the sanctuary of the Himorogi. Into that sanctuary slipped a succubus capable of transforming into anyone. The appearance, the voice, the gestures are all identical. Yet the fake possesses one slight, minuscule “difference.” To pour yourself into all seven within a week. That is the only way to suppress the maidens’ curse…