Nishiguchi is an office worker, who as of recent, is running into a lot of bad luck. One night, as she comes to pick up her drunk co-workers from a bar, she meets Shigure, claiming to be her co-worker's friend.
Her co-worker is adamant that she is fine to go back home on her own, leaving Nishiguchi and Shigure at the bar. One thing leads to another and they spend the night together. Without knowing her name, Nishiguchi move on with life thinking, "It's not like we'll ever meet again, right?" Well as luck would have it, her one night stand becomes more than that.