Do I Want to Fight the Devil Too?

"Boss, are your endurance potions serious?" Lin Ze'an looked up at the female magician in front of him, feeling quite disdainful. "I'm a buyer of fake medicines. You ask me if the medicines are genuine?" ----- It had been a while since he came to this world, and Lin Ze'an originally thought that his daily life would go on like this peacefully. Until he met a white cat named Xiao Hei. But what does it mean that I created the devil and I am responsible for defeating him? Are you saying that the one who calls me boss is the god of trickery? Oh, this is no longer a simple world!