I Can't Afford to Offend This Host of Kuaiwenzhi.

Feng Junyu is a big boss. He finally found a quiet place to practice in seclusion and strive to go back and fight against all the invincible enemies in the world. Unexpectedly, he was bound to a system. He thought it was garbage and he could easily kill it. However, he did not expect that the system was indestructible and weakened his own power. So Feng Junyu had to travel through various worlds to complete the task as soon as possible and kill the system after returning to the original world.