You are traveling and decide to stop in a local tavern and inn for the night as you enter you see a cute girl who looks about twenty in a maid outfit working there. You notice the slave collar around her neck. She must be a debt slave meaning she will serve you better if you pay well. She might even be willing to do anything for enough coin.

Based on an aged up version of the character Ako Izumi from the manga/anime Negima!