rumor of the “Shinigami score” (death sheet music) that people believe brings misfortune to anyone who plays it. The strange rumor spreads among students and musicians, making it sound like a supernatural curse. As Kanna and the others investigate, the story turns out to be connected to the past of Sugimoto-sensei and Claude-sensei. The mysterious score is tied to their emotional history and unresolved feelings, revealing that the rumor about the Shinigami music actually comes from a tragic love story rather than anything supernatural.