When the aunt who cleanser takes off her uniform...

Yukine's husband is on a business trip and her son is on his own, living a lonely life alone. One day, when Yukine finds herself bored with her unstimulated daily life, she meets Yutaka, a young employee who works at the same company. Yutaka secretly peers at Yukine as she changes clothes in the changing room, and is captivated by the glamorous body of Yukine, a normally plain cleaner. And then, after some chance, the two of them suddenly approach each other for a year. The thrill of secretly seeking each other within the company, and Yukine, who has become addicted to Toyo's young, strong body...