Kasuga Takao is a boy who loves reading books, particularly Baudelaire's Les Fleurs du Mal. A girl at his school, Saeki Nanako, is his muse and his Venus, and he admires her from a distance. One day, he forgets his copy of Les Fleurs du Mal in the classroom and runs back alone to pick it up. In the classroom, he finds not only his book, but Saeki's...