She's Already a Snake Girl, so Why Should She Be a Savior?

It is the first time for a new author to write, and I hope Haihan will do it. What will happen when a novelist named Thomas comes to another world and becomes a snake girl named Jia Feisi? However, during this journey, he is repeatedly mistaken for Mia Feisi. So, what on earth did I come to this other world to do? ... Save the world? ... I understand all the big principles, but compared to this world, you are more... The rooftop is still chasing me.