Mirai, a wife, started working in the accounting department of a construction company to save up for when they have children in the future. She chose the job because it was close to home and offered flexible hours, but the workplace was entirely male, and she was the only woman. Young and curvaceous, Mirai became the object of desire for the single, middle-aged president, Yamamoto. One day, when the other employees had all left, Yamamoto suddenly embraced her. As Yamamoto took his time licking her body in a persistent, insidious manner, Mirai's body began to react unconsciously...