C3729 Against Me
"This is not an alarmist. Kid, you just came in and you haven't experienced the horror of that time. This world has a small cycle every ten years, a big cycle every thirty years.
You came at the right time. In a few days, it will be a big cycle of thirty years.
At that time, all the food here will disappear. Think about what terrifying things will happen!" After saying that, he left in a hurry