Rui starts working part-time as a caregiver at a nursing home. Despite being sexually harassed, she does her job every day, but she catches the eye of an elderly researcher who is a former university professor. He uses his homemade hypnotism to take away her resistance to her anus, and implants it as an erogenous zone. Then, her brainwashing deepens, and she eventually becomes a caregiver who licks the anus exclusively for the elderly. The brainwashing keyword is "Loose pussy, anus, two holes, female."