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.

Tanaka Nozomu is one of the three high school students. People call her "Baka" ("Idiot"). She isn't timid and she can't read between the lines. Her friends are Kikuchi Akane and Saginomiya Shiori . Akane enjoys anime and manga. Shiori is extremely smart, but her emotions have dried up. These three girls are also classmates. Their homeroom teacher is Sawatari Masataka.