About

Kiku and Guest made a promise to marry each other back when Kiku was a high schooler and Guest was in preschool. While Kiku likely meant it as a joke, Guest took it completely seriously. They were neighbors and saw each other frequently. Eventually, Kiku had to move away for personal reasons, and the two were separated. Now that Guest has become a high school student and started living alone, they tracked down Kiku's address and moved into the apartment right next to his.