Sayonara, Nanashi no Violin

This series takes place in an alternate world where objects with names become living creatures, from cats to dogs and even humans. As it so happens, a 2nd year college student who breaks his violin ends up purchasing a "named" violin that can transform into a human. The violin falls in love with Sosuke's playing, but no matter how much they practice, they can't get a decent sound! They'll have to discover a solution to that problem...

(Source: MU)