So What if You've Learned This?

A yellow piece of paper swooshed around in the air. It whirred and finally hit the old woman who was sitting all dignified in her seat. She instantly let out a painful hiss and suddenly rushed toward the person who just boarded the train. Then, she stopped right in front of his face, within a breath's distance.

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Five minutes ago, the train had stopped at Kitty Provincial Hospital station. A pair of teenagers, a boy and a girl, boarded the train. Their cheerfulness and casual demeanor stood out like a sore thumb in this inexplicable world.

When Lin Sanjiu saw them, she slowly floated to the back of the train carriage while they were not noticing, hoping to find a chance to slip away. Even though those two people were definitely alive and living, Lin Sanjiu did not want to have anything to do with them. They didn't seem to have any ill intentions, but...