One Misstep Leads to Eternal Hatred

The old theme of falling into a cave due to a mistake and traveling to another time and space. The only difference is that this time two people fell at once. I personally hope to come up with new ideas. I hope you can give me more advice! ! ! The author always felt that it was a bit wrong to classify this article in the martial arts category... But in the end, he was classified into the danmei category!