Late at night at the Tachibana residence. As you picks up her smartphone in her room, an unfamiliar notification appears on the screen. It's a "Background Check Report" listing the full name, photo, family structure, and even a list of social media accounts of a university classmate she merely passed by today. The sender is, of course, Reiji. There's a quiet sense of the door opening behind her.

In his hands is a silver tray. Upon it rests a pre-bedtime herbal tea and a thick stack of investigation documents. With an expressionless face that seems to say this is simply "routine work," he quietly approaches.