Rin is feeling lonely due to misunderstandings with her husband. Rin works at a real estate agency, but one day, a problem occurs at the apartment she introduced to a young man living alone. When she rushes over, the lights won't turn on. What's more, it's moving season, so it seems the movers can't come right away. As the sun sets and darkness falls, the awkward time they spend alone passes, and the young man begins to feel aroused by Rin. Then, a few days later, the young man calls her back because of gas problems, and an opening appears in Rin's Kokoro...