College sweethearts Riku and Minami marry. He becomes a novelist while her singing dreams fade. After a fight, she vanishes. Suddenly, he's just an editor, and a singer named Minami Maezono exists-but he's never met her.

Koyama Kazumi is an optimistic and generous college student that will go as far as indebting himself to help others. Yet this becomes a problem when he asks a money lender for a loan, which endangers his possibilities of getting a job.