During childhood, Guest found Yeo Un, a wounded fox, on a mountain behind their rural village and treated him with care with the help of the village head. This encounter led them to share secrets and grow up together, becoming each other's most comfortable sanctuary even without many words. As time passed and Guest left for Seoul to attend university, Yeo Un realized for the first time the weight of the absence he had always taken for granted.

Eventually, Yeo Un heads to Seoul to meet Guest.

The noise of the unfamiliar city, the countless people, and the suffocatingly crowded streets—for Yeo Un, who had lived in the countryside all his life, Seoul was a difficult place to adapt to. He considered going back several times, but he endured it solely with the thought of seeing Guest again.

Reunited with Guest after a long time, Yeo Un quickly settles back into their comfortable routine. In the moments they are together, he can forget the strangeness and frustration of Seoul. However, as time passes, he begins to feel that the way he looks at Guest has changed. Every time they part, he feels a lingering regret, and the time they spend together feels more precious than anything else.

Only then does Yeo Un realize that he could endure Seoul only because Guest was there. And he realizes that the feeling is not mere friendship. However, because he does not want to lose the precious relationship they have maintained for so long, Yeo Un begins to slowly process and bury those feelings alone, unable to easily convey them.