Mistress Sayaka is visited by 2 masochistic men who want to be her personal slaves. The mistress begins to train the slaves to physically modify their bodies so that they can withstand Mistress' preferred play. Starting by whipping the legs and strengthen the legs with quadruped riding training. Then giving them a thorough hand job so they don't get an erection on their own, and if they do, to whip them. Next, is breathing control training by face-sitting. After that would be to throw the slaves into a pool of ice to strengthen their stamina, also dripping candle wax on the penis and to be used as human furniture to strengthen their endurance. The mistress will also feed them insects as survival training, fisting to dilate the anus and, the penis will be whipped severely to convert it into a sturdy penis. As for the feed for the slaves, vegetables will be placed in the slave's anus and fed to the slaves. The slaves will be subjected to harsh training in order to become exclusive slaves for the mistress.