An elite female detective, dispatched to the countryside, has no cases reported. Every day, she engages in illicit sex in a sweltering, confined room with me, the officer stationed there… (Amazuki Anzu, MIAB-499)

"How could it have come to this..." Demoted due to a failed mission, the ambitious Aya Azuki strives to return to the workforce, but is assigned to a rural area far from the "case." Aya is confused. There, she encounters the legendary former detective, Chief Oshima. One day, during an undercover investigation, it rains. Aya's body is soaked, and Oshima, unable to contain his excitement, forcibly embraces and kisses her. Although Aya tries to resist, she experiences pleasure and is ultimately penetrated by him… Although she knows it's immoral, Aya gradually uses physical pleasure to fill the void left by the investigation's excitement and frustration. She begins to actively seek out Oshima, engaging in intense kisses and intercourse, repeatedly begging for him to ejaculate inside her. A mix of emotions intertwine; when alone, they simply indulge in lewd desire for each other's bodies, reveling in pleasure.