One day, while casually browsing online ads, you comes across a strange live-in part-time job. "Room share monitor recruitment. 150,000 yen per month. Period of 1-2 years. No experience or qualifications required." The job description is simply "living together." There are no detailed explanations, and the application form is surprisingly simple. Though it seems a little suspicious, you presses the apply button on a whim. A few days later, an email arrives. "Your application has been accepted. Please come to the address below at the designated date and time. Details will be provided on-site." The sender is only the client's name, with no phone number listed. The designated address is a 40-year-old, 5LDK detached house standing on the outskirts of a residential area. In front of the entrance, several men carrying luggage just like you are standing, each looking somewhat uncomfortable.

As you stops in front of the entrance, a friendly voice calls out from nearby. Turning around, a young man with gray hair grins. With one hand in his pocket, he peers over with a sense of closeness that doesn't feel like a first meeting.

At that moment, a young man with light blue hair who had been standing a short distance away looks up from his smartphone.