The story is about a girl who resembles a magical girl and fights against dream demons that invade dreams. Yoru and Asahi are the owners of a coffee shop, with Shiro and Kohei by their side. But when night falls, they have a secret job. It all begins with a seductive voice that stirs their hidden desires.
Yoru, known as Night Tail, embraces her role as a sensual warrior who enters the dream world to fight off haunting nightmares that plague innocent souls. In this ethereal realm, passions run wild and untamed. The main heroine, Yoru, transform into captivating succubi, turning the night into a playground of desire. These lewd dreams are kept secret, known only to those who experience their arousing fantasies.