Forty thousand years ago.
Netherworld.
One evening under the slanting warmth of the sun, a horse-drawn carriage slowly passed along a deserted road within Netherworld City. The person sitting inside was none other than the Crown Prince of the Netherworld at that time, later known as the Second Generation Nether King—Feng Yi. On this occasion, he was returning from a secret visit to various places in the Netherworld, as commanded by the Ancestor of the Nether King, and had specifically chosen this remote path to avoid attention on his way back to the Crown Prince's palace.
Both sides of the road were lined with modest houses, rarely frequented by people, and very quiet, providing a relaxing atmosphere for Feng Yi who sat inside the carriage. He closed his eyes, indulging in this tranquility.
The carriage continued to move slowly.
In the midst of his closed-eye repose, Feng Yi suddenly heard the sweet and clear singing of a young girl.