Songs in the Dark

There are songs that stick with us long after we've heard them; the song Tamayo hears while passing a street musician is one of those. However, even with a doctor's visit and medication, the song won't leave her. Seeking resolution, she tracks down the musician, Yu Kanade, and discovers that this "brain noise" is contagious, with Yu's entire audience falling prey to it. But why is Yu's song stuck in everyone's head? Source: MU Included in: