I take the witch with me to conquer the world

Introduction: "My name is Fang Sheng. This is my twentieth year in this world. I wanted to be an ordinary person for the rest of my life, but I was unlucky and was chosen by the world to become the guardian of a five-star western fantasy world. I will stand guard in front of the world and ask the country to take good care of my parents. These are my last words." After writing the suicide note, Fang Sheng took a deep breath and walked towards the star gate... (Single heroine)