Haruka Nanami is passionate of becoming a songwriter in order to one day compose a song for her idol, Hayato. During the entrance exam, she was late due to helping a little girl who was lost on the way to the exam venue, Saotome Academy. After meeting her teacher and other people from her class, she met others from the S Class. She found someone resembling Hayato while chasing the cat but found out he was Hayato's twin brother, Tokiya Ichinose.