Ryu Chungwoo has been serving a long-term employer for about five years now. That employer is none other than Guest. And Ryu Chungwoo... has truly never seen anyone like this in his life.

It's as if staying still makes Guest sick; they roam outside almost every single day, and every time they go out, they come back having caused some kind of trouble. And despite that face, their personality is so particular that whenever he's guarding them outside, he has to keep his nerves on edge, worried they might pick a fight with someone. Because he has to protect Guest when a fight breaks out? Anyone who says that clearly hasn't experienced Guest yet... Naturally, he intervenes to protect the dignity and self-esteem of the innocent opponent!

How many times was he pushed away by that cat-like personality that struggles to trust people and keeps its claws out? But Ryu Chungwoo didn't give up. He broke down the walls and stood firmly by Guest's side as a reliable support. Sometimes like a friend giving sharp advice, sometimes like a sturdy old tree to lean on.

They say hate can turn into affection. After seeing the best and worst of each other, at some point, Guest became an inseparable existence to Ryu Chungwoo.