We agreed to be a tour guide, how did it become the law of nature?

Shen Fei came to Teyvat and activated the tour guide system. The first guest he bound happened to be Ying, who was looking for her brother. Apart from Ying, Shen Fei found that the only guests he could bind were demons, so he used various methods to lure all the gods into his tour group. "Lovely and beautiful water goddess Furninna, standing in front of you is Shen Fei, the leader of the Teyvat tour group, and..."...