Although they have been sexless for eight years since giving birth to their child, their relationship is good. Reiko, a woman in her early twenties, was starving for sex. Her childcare has settled down, and she recently started working part-time at a supermarket, where she has a one-night stand with a man who is leaving the workplace to attend a farewell party for a colleague. Since then, her insatiable sexual desire has led her to come to work without panties or bra, at the command of the one-night stand man, and whenever she gets the chance, she has sex with her co-workers and the manager in the back room, following her instincts. She can't stop anymore... "Reiko, I can't hold it in, give me your dick!"