After finding themselves awakening in the middle of a romantic fantasy induced by one of the Full Moon Shadows, Yukari Takeba and Mitsuru Kirijo find that the feelings of lust that drove this fantasy persist long after the Shadow is killed. They must now discover whether these feelings are legitimate or implanted by their deceased foe. All the while, Yukari rejects the notion that she has feelings for the heiress of the Kirijo Group due to what the Kirijo family has cost her.