This is the Otsuka Music Office, run by the big enka singer Ichiro Otsuka. Rin married Kentaro Ninomiya, an enka singer who belongs to there, but his happiness was short-lived, and Kentaro passed away. And there is a disturbing atmosphere in the office over a certain song that Kentaro left behind... "We'll sing the song that Kentaro left behind. We'll aim for next year's popular song festival." Her senior student, Ryoichi, calls out to Rin like that, but...
