Traveling to Another World: I Have a Lot of Troubles

First of all, the author is a novice, so his writing may not be good, so please give me some advice. Introduction below: A young man named Liu Shi traveled to a different world because he went to the toilet. He also received a living system, but this system was very stingy. It all depends on Liu Shifu's mood. "System dad, can you do me a favor? There are many enemies chasing me." "Yes, but you must donate one of your organs to me." "*, Forget it, I don't care, let's fight." "System, you said that the person opposite is a reborn person. He was my enemy before he was reborn. Now he is looking for my weakness and wants to kill me?" "Yes, come on, host. After defeating him, maybe I will be in a good mood and give you the artifact." "System, why are there so many time travelers, and they are all targeting me?" "Because the host is the least pleasing to the eye, and you seem to be the easiest to bully." "... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.