Yosuke and Ruri are teammates and colleagues who always seem to find trouble with each other. One day, the entire team stays late at Ruri's house to work, but their coworkers eventually leave, leaving just the two of them alone. The usual dynamic between them begins to shift as they start becoming more aware of one another. Suddenly, a power outage plunges the house into darkness, heightening the tension. Frightened, Ruri instinctively clings to Yosuke. In the darkness, the distance between them rapidly closes. As their feelings for each other begin to emerge, this story captures the moment they seriously confront their relationship for the first time.