Sin is a rock star. He has an amazingly loud voice with a range of four octaves. His secret is that he has created his voice through a method of vocal cord doping. His voice is now teetering on the edge, due to side effects from the vocal cord doping. Around this time, Sin meets Fūka, who is a street musician. When Fūka sings, her voice is so small. Due to Fūka, Sin looks back upon his past.
Sadao Abe
Sin
Riho Yoshioka
Fūka Ashitaba
Yudai Chiba
Sakaguchi
Kumiko Aso
Female Doctor
Eiji Kotoge
Jimetsu
Yuki Katayama
Seiko Inō
Yuko Nakamura
Kinomoto
Shoko Ikezu
Sin's Mother
