Yuusuke's ordinary high school life takes a fantastical turn when he encounters the angelic Noelle, who drops into his world in the nude, with a childlike innocence. Suddenly, he becomes a part of an eccentric family of supernatural beings: a calisthenics-loving Frankenstein as the father, a beauty with a peculiar 'round object' obsession as the mother, an invisible elder sister, a rebellious vampire brother, and a young inventor as the youngest sister. Adding to the mix is a disapproving witch Grandma with her vulture companion. Yuusuke's original crush on Natsumi takes a backseat as he finds himself trailed by an angel-in-training, while Noelle is guided by the enigmatic Michael on her celestial journey.