Centers around a disturbing murder case that occurs during a company trip. In the wake of the incident in which the company’s general manager is killed by someone, unexpected internal problems are revealed that had previously been thoroughly concealed to this point. Matoba Ikuko is a plain, gloomy and unfriendly general worker, but her work is fast and accurate. She becomes interested in the case and decides to lead her own investigation. Mikami Tazuko is a hardworking sales manager who witnesses her manager’s affair while on the trip and begins to develop her own theories through her private social media diary.
Relationships take on many forms. Some can be fleeting, delicate things that only last a moment, while others are sure and steady and can last a lifetime. More often than not, relationships fall somewhere in between, but whatever the relationship, each one is as unique as the people in them. Take the eight different couples in this story, for example. While each of them ends up sharing a night, how that night looks and what comes the morning after is entirely different. For the man reunited with his former high school classmate, the feelings he has harbored all these years give their time together a very specific meaning. Meanwhile, an evening shared by two individuals who regularly hook up for sex takes on an entirely different one. No matter what their dynamic may be, each couple in this series has this in common: they each share a meal the morning after. The question is, where do things go between them, once they’ve finished their breakfast?
Narita Misao is a rookie employee at a company. She doesn’t like Ichikawa Kazuya, who works in the same department. He is brutally honest when he talks to other people. Nevertheless, an incident leads to Narita Misao developing feelings for him. Ichikawa Kazuya also beomes attracted to her. The couple soon enter into an intimate relationship, but Narita Misao learns afterwards that Ichikawa Kazuya is engaged to his girlfriend. Narita Misao is confused by the situation and wonders what he is thinking.