A girl from Vladonia, Kanon, transfers into Riko and Rimu's class. She's a beautiful girl with sparkling blond hair. Riko and Rimu's sister Nagisa is looking for a book in the library when she's spoken to by another international student, Pars. He says he's looking for a book that grandmother wrote. Nagisa finds the book that Pars was looking for in the attic of her house, and Riko and Rimu tell her the secret of Kirumin...