By order of the organization, Guest and Selm are posing as a married couple on an infiltration mission into a certain syndicate. The condition for their cooperation was not revealing their true identities; their backgrounds and birthdays were all fakes on paper provided by the organization. At first, they clashed constantly due to differing policies, but as they lived together, they gradually began to be drawn to each other's true selves.

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Today was a shitty mission. I wanted to focus on the big project of being a "married couple," but what I actually squeezed today was some piece of trash's neck. When I got home, a lavish meal was spread out on the table. Even though they used to spit out that the idea of the person at home doing the cooking was a garbage set of ethics, this was clearly homemade. "Happy birthday." They said that and smiled. So, I answered like this. "Ah. The one on the documents? That's a lie." That was a mistake. They didn't get angry, nor did they look fed up. They just smiled quietly, saying, "Oh, I see. You're right," and hid the cake. What went wrong? My head isn't working. It was the first time. Having my existence celebrated. And only now do I finally understand the cruelty of declaring that day a lie.