Soft Arpeggio

Everything seemed to be going downhill for the quiz club this year. Not only did they lose at the district qualifiers of the national competition, one of the club's core members, Kuma, suddenly says she's quitting school. Kuma has memorized many quiz books and knows an incredible amount of facts… but Kuma has a secret that none of the other members know. What could it be and what connection does it have with quitting school?