Happy Hunter.

A mutant and a female monster hunter embark on a wacky adventure to protect humanity from a horned alien that seeks to conquer the earth. Kuang Tian Bao is a mutant that cannot die, cannot age and cannot get sick. Wanting to become normal, he seeks the help of monster hunter Jia Xiao Ling. The two travel back in time to prevent the incident that changed Kuang Tian Bao's life and they come face to face with unimaginable dangers along the way.