Reiko Sawamura is a career woman who demands perfection in her work, guiding her subordinates with a strict and stoic attitude. Known in the company as an untouchable beauty, no one dares approach her—yet in reality, she's shy and extremely inexperienced in love. Having never relied on a man or experienced romance, she's spent her lonely 40s without a boyfriend. On her days off, she isolates herself at home, indulging in forbidden fantasies and writhing in secret desire. Then, suddenly, her life takes an unexpected turn. Two male employees are assigned under her: one a muscular, confident older brother type, the other a fresh, younger brother type newbie. While Reiko is drawn to their earnestness, she continues to train them with her usual severity. But as her interactions with them increase, her fantasies grow more intense. The moment she touches the muscular man's shoulder, he lifts her up and carries her to bed. Shy and trembling, she's gently kissed, her clothes smoothly removed as he caresses her body. Then, as he thrusts into her fiercely, Reiko experiences an orgasmic bliss unlike anything before—marking the beginning of unforgettable days consumed by passion.