Borrow the Dragon's Life

I was not supposed to appear in this world. It was my grandfather who borrowed the dragon's life to allow me to be born. When I was born, nine big snakes were entangled on the roof beams. All livestock in the village were dead and all crops were withered. When I was three years old, my mother fell into a well and died. When I was six years old, my father hanged himself in front of his house. When I was nine years old, in order to survive, I married a big snake as my wife, changed my surname, and became my son-in-law...