A male employee falls asleep at his desk while working late alone. Cute young adult cleaner Rinka Natsume enters without realizing he is there, and the sound of her work wakes him. Aroused as he watches her clean, he grabs her breasts and silences her with deep tongue kisses. Startled but offering little resistance, Rinka goes along with his demands. Several days later she returns for another late-night shift and finds him waiting with a sex toy. When he presses a powerful vibrator against her clit, her panties quickly become soaked.