High school student Yuusuke's life took an unexpected turn when he met Noelle, a charming and haloed girl who literally fell into his arms in a state of complete innocence. Suddenly, he found himself welcomed into an unusual family of supernatural beings: Papa, a Frankenstein monster who enjoys exercising; Mama, an attractive woman who adores "round objects"; older sister Sara, who's perpetually invisible; Gabriel, the teenage vampire with attitude; and young inventor Ruka. Adding to the mix is disapproving Grandma, a powerful witch, and her faithful vulture sidekick. Yuusuke's original aim was to catch the eye of gorgeous Natsumi, but now he's got an angel-in-training, Noelle, following him around, while Noelle herself is guided on her journey to angelhood by the enigmatic Michael.