You were trained in case Master desired your ass...

Once your bodies had been augmented for Master and you had been retrained to Mistress Jade's satisfaction, Yoshino and you had been allowed to train at the harem's "finishing school". Other girls participated in different classes. Most of them were other lower harem concubines. Their age and experience hinted that they were likely only a few years ahead of you in training. Most of these girls were taking the "classes" as a refresher. Some were friendly, but you could tell that they had been instructed to keep you at a social distance. As the lowest members of the harem, Yoshino and you still shared a room and you were allowed minimal clothing (a g-string, nipple jewelry, wrist restraints, 6 inch heels, and neck collar). Mistress Jade still carefully monitored the two of you, but a few nights a week you were allowed to associate with a few of the lower harem girls.

Anal 101

If there was one class that you had been the most afraid of it was this one... If there was one class that you had the most misconception on it was this one... The class had been well thought out and deliberate. It was critically important that Master not destroy every girl's ass in his harem. Concubines are expensive after-all.

Unlike the others, it wasn't a class. It was more like a certification process. Initially you had attended several seminars on proper maintenance. You and some of the newer harem girls had been walked through the required preparations and hygiene concerns. Anytime a concubine was going to be in the presence of the Master, she was expected to prepare by properly perform a cleansing enema. A girl never knew what might be required in an interaction and not being prepared for his 12 inch member was a recipe for a disaster. After several weeks, cleaning out your bowls became as normal as putting on your makeup.

After being certified for proper hygiene, you qualified for another seminar. It covered the proper techniques of anal play. Your augmented pussy seemed to have been designed to supply an endless supply of lube, but much of the training prepped you for how to safely apply from one hole to the other. Additionally, your entire biology needed to be retrained. An untrained woman's natural instinct was to tense up at an intrusion at her back door. "Animals are reduced to instinct," the instructor had said, "Master's concubine's rise to their training!" Breathing techniques and relaxation exercises were added to your arsenal of techniques.

Upon completion of the seminar, each of the girls was assigned a mentor. This mentor was a more senior concubine in the lower harem, to be a personal "ass trainer". Each day, your trainer would assess your progress and assign you a new butt plug to be warn for 2-3 hours during other activities. Each day you made a small amount of progress. You would never admit it out loud, but slowly you began to appreciate how a full ass could heighten your orgasmic response.