He accidentally fell off a cliff and died. He traveled through time and became a dragon that had just successfully overcome the tribulation. He ignored his physical abnormalities and devoted himself to becoming a dragon with the intention of achieving righteousness.
Who would have imagined that in a catastrophic situation, one would meet an ignorant child, fail in seeking a seal, and have no choice but to travel through mountains and rivers to spend this life.
When she met that person again ten years later, Anri had no way of knowing whether it was due to a sin in this life, a previous life, or a longer time ago. She only knew that this person could never escape from her grasp.