Nana, happily married to her husband, suddenly finds herself forced to accompany a company retreat as a hostess for Mitsui Kogyo, one of her husband's clients, after his company suffers a major blunder. Relying on her husband's reassurance that all she needs to do is pour drinks, Nana reluctantly accepts the job. However, on the night of the retreat, deep into the evening, the banquet hall is already filled with drunken employees acting like wild animals. Forced into a lewd costume and thrown into the chaotic scene, Nana struggles with fear and anxiety as she tries to survive the night.