Sirine

Right on the tripoin border, previously, there was a river that separated North Korea and Russia. However, since the dungeon's appearance one year ago, the surrounding structures were destroyed. It turned the river into a field within a radius of 20 km.

The border area was far from the city, making the atmosphere of the night at the dungeon guard post feel desolate.

Captain Chang seemed to be relaxing, eating noodles while staring at the rows of monitor screens captured by the cctv. His subordinates in charge of monitoring looked bored; they yawned and occasionally rubbed their eyes from sleepiness.

To ward off their boredom, some of them played mahjong. Captain Chang would not scold his men, as long as they were not asleep. 

This was the condition of the dungeon guard post at the border.

They had been in charge of guarding the dungeon for over a year. There was no incident that carries a serious threat.