After missing the last train, a woman and her boss spend the night in a capsule hotel, where she must care for him when he falls ill, sparking unexpected closeness and revelations in their professional relationship.

The anime centers on Minori, an office worker, and her boss Hadano, who are constantly arguing with each other. One night, after a company drinking party, Minori and Hadano are having their usual argument, when Minori realizes that she has missed the last train. They decide to spend the night at a nearby capsule hotel, but an incident forces them to share the same unit.