Sayonara, Nanashi no Violin Goodbye, Nameless Violin

Synopsis

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)