I recommend "My Toy Store Really Doesn't Sell Shapeshifters" to you. This is a light novel-a fantasy novel. The protagonist, Yuan Teng, traveled to a strange world and found a toy store. There was only a belt from a feature series in the store. Although he was penniless, he could only grit his teeth and sell toys until the fated person stepped in. This world became more and more different. The book contains a lot of information about knights, and the belt that Yuan Teng obtained is also similar to a knight's equipment. It should meet your needs. I hope you like this fairy's recommendation. Muah ~😗