Yuna works as a receptionist at the company where her husband works. They are known in the company as a loving couple, and one night, they have sex after applying an aphrodisiac known to increase sensitivity to the crotch area. The aphrodisiac doesn't suit Yuna's crotch, and the doctor diagnoses her not to wear underwear... The next day, Yuna can't take the day off work, so she works hard without underwear. Meanwhile, a certain guest visits the company. Little does she know that the guest will cause a commotion, and Yuna without underwear will be caught up in it...