Kaori Shiine is a popular and talented pop idol singer fresh from completing her first live tour. She cultivates a public image of innocence and broad appeal. This carefully maintained image masks a significant secret: she possesses intersex physical characteristics, medically termed intersex or colloquially referred to as hermaphrodite, specifically described as having two sets of genitalia. This condition represents a profound vulnerability within her professional life.

Only her manager and lover, Yuko Imai, is privy to this secret. Revelation of her anatomy would lead to immediate career termination. The narrative centers on this secret becoming endangered when Saki Midorisawa, a rival idol singer with a lesbian orientation and a prior connection to Yuko, accidentally discovers Kaori's condition. This discovery occurs when Saki sees Kaori in a bathroom during a battle of the bands event. Saki's newfound knowledge poses a direct threat to Kaori's career and public standing.

The story explores the tension generated by this secret and its precarious potential for exposure. Kaori's background is defined by her idol career and the dual life she leads. Her character development focuses on navigating this precarious situation where her professional existence hinges entirely on preserving the privacy of her body, as public exposure carries absolute, career-ending consequences. The portrayal remains centered on her identity as an idol, her concealed intersex condition, her relationship with Yuko, and the threat introduced by Saki's knowledge.