Nanami has been married to a colleague for almost a year and is enjoying her happy newlywed life. Then, due to a personnel transfer, the new section chief, Ono, was assigned to their department. Nanami and Ono had a relationship once before they got married. Despite feeling awkward, neither of them mentioned the past, and they silently went about their work. One day, because there was an error in a document Nanami created, she and Ono ended up having to work on a day off. In the empty office, Ono makes advances towards Nanami. Due to her sense of guilt for causing trouble, Nanami doesn't strongly resist, and the two cross the line again.
