"I don't think what happened that night was just a mistake."

Sawabe works at a travel magazine publisher. One day, she gets the chance to visit a luxurious hot spring resort for a special feature on couples. Although it's for work, Sawabe is excited about the free overnight stay. However, her excitement is cut short when her editor-in-chief says, "Since it's a couples' feature, you should go with a male colleague," and Sawabe ends up having to go with Fukumoto, a junior colleague she has been avoiding.

After completing the shoot and returning to her room, Sawabe finds Fukumoto waiting there...!?

A problematic "around thirty" girl and her slightly frivolous junior colleague end up sharing a room, even though they should never be alone together, leading to a major crisis!