Yuki felt self-conscious about her large 97cm H-cup breasts. One day, she visited a clinic and underwent an excessively intrusive examination, during which her breasts were roughly groped and she was subjected to titty-fuck tests using toys and a fleshlight, amounting to near sexual harassment. She was then informed she required emergency hospitalization. During her stay, she received intensive erotic treatment, through which her breast complex gradually transformed into pleasure, awakening new sensations within her.