The Strongest Store Owner: All My Products Are Customized

[Relaxed and humorous + cool writing + unscrupulous + non-invincible writing] Chu Feng traveled through time and became the owner of a small shop that no one cared about. Ding—— The strongest shopkeeper system has been bound! Advanced system customization, you deserve it. I thought I would embark on the path of being invincible as the protagonist, but I never thought that I would be surrounded by demons, fairies running rampant, and even my whole clan would have weird tempers. Night falls, and the Dark Tribe is raging. What, no lights allowed? I don't want to either! Someone: Sorry, I didn't bring enough money! Chu Feng: What? If you don't have money, do you still dare to learn how to do customization? You're done! Chu Feng's smile was like a devil, and he took out an unequal treaty...