Rinko works as a manager at an underwear manufacturer, but she is strict about her work and is sometimes criticized for being a ``arrogant female boss.'' At that time, she receives a complaint from a mail-order company that she works with. The other party feels arrogant at Rinko's business-like attitude as she apologizes on behalf of her subordinate, and she further reveals her anger and forces her to insert a vibrator into him, saying, ``You have no sincerity!'' After that, the complaints continue, and Ririko is humiliated with a vibrator every time she is called. However, her shame turns into a secret pleasure...