50,000 years ago, Hell was destroyed because of too much Foul from the resentment of the souls that later turned to Soul Eaters and devoured everything in their wake, leaving nothing of Hell. The gods above in Heaven, in order to take care of the newly-died souls, created the Afterlife Department comprised of grim reapers. Huo Ling was delivering food that day when he met Yi Bing and the guy gave him a warning. When he arrived to the customer's unit, he was killed. Huo Ling: you set up a death flag for me! Yi Bing: I'm a grim reaper. I'm the flag myself. Let me help you solve the mystery of your death. Huo Ling: your sister! Alternative title: The Different Ways I Died at 23 Update: daily
"So, because the corpse of this second young master appeared in many places at the same time, they created this 'rule'?" Shi Jiu said.
The rule is to stay away from the waters at night. Even on day, they shouldn't stay near it for too long.
"This world is said to be supernatural." Huo Ling spoke. "So, it's because of this?" he said and looked at Yi Bing.
"I think." Yi Bing said. "We didn't notice anything unusual that could be a supernatural when we arrived, until we find out this." he explained.
They nodded in agreement. The classification and sub-classification of the worlds are based on two things: time, and the energy, respectively. A world classified as normal or special is based on time. It is a Normal World if it is an ancient or modern world. If it is beyond, then it becomes a Special World. As to how beyond the time it is… it depends on the technology of the world.