Nami Kuroki is a beautiful, stylish office lady who is good at her job. She is very popular at work, but for some reason her favorite male employee becomes like an empty shell and quits... One day, Kuroki and her junior colleague Okada end up sharing a room with a broken air conditioner, which was left over after a mistaken reservation at a hotel on a business trip. Okada, who recently got married, is worried about sharing a room with Kuroki, but is forced to stay the night.