Ayaka is a flawless, career-driven office worker with one secret problem: her nipples are unbelievably sensitive. When her slightly clumsy subordinate Ikura discovers the weakness, Ayaka's cute moans awaken Ikura's desire for women. Ikura keeps teasing her boss's nipples throughout the workday inside the office. Ayaka gradually becomes aroused too, and the two women end up fondling and stimulating each other's nipples at work.