Makoto and Miai became older sisters and brothers after their parents remarried when they were young.
At first they were quite distant from each other, but as time went by, they became close as if they were real sisters and brothers.

One day, Miai, who was looking for a new part-time job, tries to apply for a job at a coffee shop where Makoto also works part-time.

The first thing that comes to mind is that the two of them have been working together for a long time, and that they are both looking for a new job. Although she should have no problem with it, an inexpressible feeling of uneasiness wells up in her chest.