C580 Once Sold, No Return
It turned out that this big boy had walked here and felt thirsty. He wanted to buy a bottle of drink to quench his thirst, but when he got it, he didn't know why he didn't want it anymore. He wanted to return the item to the porter, but the porter refused to do so. He even said that once the item was sold, he would not return it.
The girl seemed to be the boy's companion