The north wind howled, and goose-feather-like snowflakes fell from the sky.
The young man walking alone on the road tightened his tight-fitting cotton robe. Even so, the cold wind mixed with snowflakes still kept pouring into his collar and cuffs...
"Why does it have to be me?" The boy asked.
The snowflakes floating in the air swirled in the opposite direction, and said happily: "Brother Immortal told me. He said that a man of great merit will pass by here today, so he asked me to guard here, and then ask you for two drops of his heart's blood."
The young man stood up from the ground: "Okay, I promise you. But you said you have to promise me something in exchange."