Every day, the new employee Riku is yelled at by her boss and struggles with work. The person she meets is Yuko, a cleaning staff member at the company. Among the plain-looking cleaners, Yuko appears graceful and beautiful, standing out as someone completely different. Her presence gradually brightens Riku's daily life and slowly heals her heart. One day, Riku—unconsciously drawn to Yuko—finds herself repeatedly watching her, until she accidentally witnesses Yuko undressing. That shock and sudden surge of desire leads Riku to give in, culminating in a scene where she pins Yuko down.