Joshi toire: Etchina misshitsu.

Masumi Yoneda, a cleaning lady at a building, is enraged when she finds a condom discarded in the toilet wastebasket. Masumi begins to search for the female employee who is disrupting discipline, and sets her sights on Nishikawa Kira, a new employee who is popular with the male employees. Meanwhile, Kira becomes suspicious when she makes eye contact with Masumi at work...