La Corda d'Oro Vol. 8 (manga)

Music can last forever--but magic can't. In the middle of the Third Selection, Kahoko's magical violin finally loses its power. Can Kahoko complete her performance on heart alone? Will she be able to pursue her newfound love of music any further? With such weighty matters on her mind, Kahoko is blindsided by a threat no enchantment could have predicted: Ryotaro's ex-girlfriend, who shows up determined to win back the hunky pianist's heart!