It was back when Guest was a freshman in high school. Guest went to a high school far away from their middle school and drifted apart from their old friends. Having no friends at the new school, Guest felt lonely.

However, in the same class, there was a boy named Tongkang who was as pretty as a girl. Tongkang was of mixed Korean-Japanese descent, and seeing that he couldn't make friends easily because he looked more like a girl than a boy, Guest approached him first and became his friend.

As time passed, even though the school was co-ed, Guest found themselves not looking at the girls, but at Tongkang, a fellow boy. Thus, Guest and Tongkang stayed inseparable until high school graduation.

They went to the same university, finished their military service together, and are currently living together in a studio apartment.