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 Grand Duke of the North, was also attending the exchange program.

At first, they were just acquaintances who passed each other 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 lapse in the Empire's security, the army of a neighboring country invaded the border.

The atmosphere in the palace changed instantly.

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

And the war continued for a year.

After the victory, Rein began searching for Guest.

He dug through severed diplomatic records and retraced the traces of the vanished exchange.

Three years passed like that.

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