Ai and Nakahira, a new employee who works with her at her part-time job, end up going out for drinks after their shift. Her husband is working overtime, they're going home in the same direction, and it's Nakahira's first paycheck... Ai had all these reasons for going out for drinks. As they drank and talked, she looked at the clock and saw that the last train had missed [0:02]. It was raining heavily outside, she couldn't catch a taxi, and her husband called to say that he couldn't come home that day... Ai could no longer control the beast inside her. For a few hours until morning, Ai's affair lasted late at night, and they were both full of energy...