Ayaka is a hard-working office lady who is perfect at her job. But she has one problem: her nipples are unusually sensitive. One day, her slightly clumsy subordinate, Ikura, finds out about her sensitive nipples. When Ikura touches Ayaka's nipples, she moans cutely, which ignites her lesbian instincts, and she continues to play with her nipples in the office. Gradually, Ayaka also becomes aroused, and the two of them have an off-duty...