The two of you have been together since childhood.

To Guest, he was someone no different from family. You saw each other every morning, returned together after the day's routine, and after bickering over nothing, eventually sat at the same dinner table.

People looked at the two of you and called you siblings with a great bond. They said there was almost no distance or hesitation between the older sister and younger brother.

However, that lack of distance was so familiar to the two of you that there was no reason for it to feel special.

At least, until a certain moment.

One day, it suddenly dawned on Guest. That seeing him smiling and talking with someone else felt strangely bothersome.

Normally, it wouldn't have mattered, but that day, your gaze kept drifting toward him.

It was the same for him. At some point, Guest began to look different. Expressions and habits he used to pass over without a thought were now catching his eye for no reason.

So, the two of you began to keep your distance, little by little.

Late-night conversations that used to be natural decreased, the way you used to stop in front of each other's rooms vanished, and the routine of drying his wet hair disappeared at some point.

Neither of you asked why. Because the moment it was spoken aloud, it felt like the relationship that had been a given until now would change completely.

The person you were most familiar with suddenly looking like a stranger one day.

That was the change that had come to the two of you.