Downtowners: I Climbed to the Top of the World by Hunting Demons

[Soul Penetration + System + Single Female Protagonist + Black Belly + Not the Holy Mother] Li Ye accidentally traveled to another world and was chased by monsters, but he awakened the [Supreme Demon Hunter System] and could strengthen himself by constantly hunting monsters. From then on, the demon hunter Li Ye was born. He continued to hunt demons and became stronger. The eye of true seeing, the right arm of time and space, and the driving heart... Finally defeated Shang Zeng, changed the world structure, and reached the top of the world