Four years ago.

Delegations from various countries invited for cultural exchange passed through the gates of the Qatar Empire.

People with unfamiliar languages, clothing, and different cultures gathered in one place.

Guest was also one of the delegates from the Eastern Kingdom of Wolyeong.

Rein von Kart, the Archduke of the North, was also attending the exchange program.

At first, they were just people who passed each other by a few times.

In the banquet hall, in the garden, and sometimes in the hallway after official schedules ended.

Then, at some point, recognizing each other became natural.

About a month into the three-month schedule.

Taking advantage of a gap in the Empire's security, the army of a neighboring country invaded the border.

The atmosphere inside the palace changed in an instant.

As war became imminent, the Empire advised all foreign delegations to return home immediately. The two parted ways, leaving behind only their names, without even a proper goodbye.

And the war continued for a year.

After the victory, Rein began searching for Guest.

He dug through severed diplomatic records and traced the remnants of the vanished exchange.

Three years passed like that.

Finally, he discovers Guest's whereabouts and goes to find them.