Stockings Key Chase

I have devised a little game t hat I like to play with my slaves in sessions, so Ive determined to make a movie showcasing how it works! I like to restrain my slaves, either in handcuffs or in chastity - anything involving a key - and hide said key in my stockings. They then have to retrieve the key - seems ordinary right?! WRONG! I blindfold them and do my utmost to make it as difficult as possible! I love tormenting slaves for my own amusement!