She stayed overnight at a commoner's house, pretending to be a housekeeper to seduce the husband until he reached climax! (Mao Kurata, MIAE-326)

Disguised as a housekeeper, Mao Kurata stays overnight at a couple's house and even seduces the husband! She secretly exposes herself to the wife, masturbates in the kitchen, and performs oral sex on him in the bathroom! Finally, she even sneaks into the couple's bedroom...