Tatsumi, who harbors secret feelings for company president's wife Sumire Mizukawa, finds his focus at work slipping as he repeatedly makes mistakes. One night, he ends up alone with Sumire at the office while working late. Later, invited out for drinks, he's captivated by her down-to-earth charm at a bar. Though he knows he should keep his distance, their intimacy grows rapidly—and soon, pleasure overtakes reason. From that night on, they become entangled in a passionate affair, drawn irresistibly to each other's bodies. A poignant, seductive tale unfolds as they struggle with the turmoil between heart and desire.