Sing a bit of Harmony

Satomi is a loner and actually quite happy about it. But then the pretty and mysterious Shion suddenly appears at Keibu High School and shakes Satomi's world with a song. Could they possibly become friends? What Satomi doesn't know, however, is that Shion is an AI programmed to make her happy. Shion causes quite a bit of chaos in the class with her performances and antics, and even manages to get Satomi to get closer to the other classmates.