Yamada Masami leads a double life. By day, she is an ordinary student in Tokyo, wearing glasses and pigtail braids. At night, she dresses up and transforms into the glamorous call girl Miyabi. She does not do this solely for money; she enjoys the pleasure and happiness she brings to her clients. However, this double life may not last forever. Her chubby friend Aki, who is desperately dieting to attract a man, cannot understand why Masami is so against having a boyfriend. Her other classmates, the perverted Kaneko and the wealthy Sasaki Kaori, hold opposing views on the acceptability of the pleasure industry. What will happen if the people who know Masami by day discover the secret existence of the lovely Miyabi?