Yumiko attends the sale in a lewd cosplay in order to find out the truth about her husband who goes to the sale by pretending to his wife that he is on a business trip. However, there is a rotor installed in her clothes... Her husband is unaware of his wife's cosplay, and the low-angle shot and the trembling rotor bring her to the brink of climax! What's more, her husband, who doesn't know anything about it, comes to the men's restroom where Kazuya took her...? Yumiko can't wait to fall into pleasure due to the NTR sex with a lot of immorality just before being discovered...!