Who Created the System?

In the morning, Nathan woke up late to find that everyone had already left the room. He could hear the chatter and laughter of his friends outside, as well as Muramoto being teased by Linda.

He quickly straightened his clothes, brushed away the layer of frost, and stepped out of the room.

His eyes were instantly drawn to the bright sun that lit up everything. The light felt refreshing against his face after a long, intense night in the blizzard. The snow was still thick around the shelter, which seemed to have been cleared by his fellow comrades.

The other four gathered around the fireplace and seemed to have prepared themselves in battle attire. They turned to Nathan and waved their hands.

"Oppa!" Linda beamed as she noticed Nathan approach her first. She tapped on her shoulder, causing her to smile awkwardly. "How was your sleep, Oppa? Did you realize that I hugged you last night?" She said.