"Doctor, is there something wrong with my nipples?" The woman who asked this question unknowingly finds herself drawn into a corrupt clinic. During the examination, the physician notes that her nipples are abnormally hard and sensitive, urging her to return for a follow-up. As his hands touch her nipples during the check-up, hidden desires begin to stir. A big-breasted married woman, Okuda Saki, gradually becomes aroused as the perverted doctor manipulates her nipples without her full awareness. The scene, eerie yet compelling, is filled with triggers that awaken primal pleasure.