A college student working part-time at a convenience store grows close to his married coworker Ririko Kinoshita. When she spots condoms among the discarded products and admits she has not slept with her husband lately, the inexperienced young man makes his move. She initially laughs him off but eventually pulls him into the restroom and suggests they finish before a customer arrives. That first condomless encounter turns into an ongoing affair, with the pair squeezing in frantic quickies and creampies between customers until his cock barely gets a break.