Chouritsu Houmuru Zyklus;code. Musical tools have minds and bodies, feelings and thoughts. When they are thrown aside and abandoned, they can become corrupt, even murderous. Petrauchka is an instrument unlike any other; she can't make music at all. After the enigmatic Rentarou was discovered in a garbage heap, they had to team up to settle the distraught lute and maybe discover the secret to Petrauchka's lack of musical skill. Could Rentarou somehow unlock his latent talents?