Rui starts working part-time as a caregiver at an elderly home. Although she experiences sexual harassment, she continues to do her job every day. However, a retired university professor researcher sets his sights on her, using his homemade mind control device to remove her resistance to anal stimulation and implant it as an erogenous zone. The brainwashing deepens, and eventually, she becomes a caregiver who specializes in licking old men's shitholes. The brainwashing keyword is 'ガバマンクソ穴2穴メス'.
