Himari is an underpaid nurse at a Tokyo hospital who accepts a secret arrangement with the director she despises in exchange for higher wages. His relentless nipple training gradually takes control of her body: examinations become pinching and twisting, nipple orgasms trigger urination during oral sex, toys make her cum and squirt repeatedly, and he keeps working her nipples while pounding her. His precise stimulation makes her climax until she loses bladder control, ending with a piss-soaked orgasm and a creampie as he mocks his “perverted little nurse.”