The series is set in a private school Japanese, Hakujo Academy, and is centered on the male protagonist Yuto Ayase and his classmate Haruka Nogizaka. A second anime series entitled Nogizaka Haruka no Himitsu: Purity was announced in a pamphlet included in the tenth volume of the series of light novels and Spice Wolf.
Yuto is an ordinary guy, unlike Haruka is very beautiful, intelligent and rich, for this reason it is regarded as the unattainable girl of the school and is admired by all his classmates have called "Nuit Étoile" (The Star light of the night shining fluorescent) and "Lumière du Clavier" (The gleaming princess piano).